Which quadratic equation has real solutions?
A. 4x^2 -5 = -7
B. 2/3x^2 +7 = 11
C. 3x^2 -1 = 8x^2+9

Answers

Answer 1

Answer:

B. 2/3x^2 +7 = 11

Step-by-step explanation:


Related Questions

x-2(-x+9)=0
What is the value of x?

Answers

Answer:

the answer is x =6

Step-by-step explanation:

hope this helps!!

Write an equation of the line that passes through the points (-1,8) and (2,-4)

Answers

Answer:

y=mx+b

y=-4x +12 is your equation

m= yo

your slope

Step-by-step explanation:

Answer:

The equation of the line that passes through the points (-1,8) and (2,-4) is:

[tex]y=-4x+4[/tex]

Step-by-step explanation:

Given the points

(-1,8)(2,-4)

[tex]\mathrm{Slope\:between\:two\:points}:\quad \mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]\left(x_1,\:y_1\right)=\left(-1,\:8\right),\:\left(x_2,\:y_2\right)=\left(2,\:-4\right)[/tex]

[tex]m=\frac{-4-8}{2-\left(-1\right)}[/tex]

[tex]m=-4[/tex]

As the point-slope form of the line equation is

[tex]y-y_1=m\left(x-x_1\right)[/tex]

where m is the slope.

substituting the values m = -4 and the point (-1,8)

[tex]y-\(8\right=-4\left(x-\left(-1\right)\right)[/tex]

[tex]y-8 = -4(x+1)[/tex]

Add 8 to both sides

[tex]y-8+8=-4\left(x+1\right)+8[/tex]

[tex]y=-4x+4[/tex]

Therefore, the equation of the line that passes through the points (-1,8) and (2,-4) is:

[tex]y=-4x+4[/tex]

How can Ari simplify the following expression? StartFraction 5 Over a minus 3 EndFraction minus 4 divided by 2 + StartFraction 1 Over a minus 3 EndFraction Write the numerator and denominator with a common denominator. Then divide the numerator by the denominator. To do this, multiply the numerator by the reciprocal of the denominator. Write the numerator and denominator with a common denominator. Then divide the numerator by the denominator. To do this, multiply the numerators and multiply the denominators. Divide the numerator and the denominator by a – 3. Then divide the numerator by the denominator. Divide the numerator and the denominator by a – 3. Then simplify the numerator and simplify the denominator.

Answers

Answer:

the answer is a

Write the numerator and denominator with a common denominator. Then divide the numerator by the denominator. To do this, multiply the numerator by the reciprocal of the denominator.

Step-by-step explanation:

Simplifying an expression involves breaking down the expression.

The true statement is: (a) Write the numerator and denominator with a common denominator. Then divide the numerator by the denominator. To do this, multiply the numerator by the reciprocal of the denominator.

The expression is given as:

[tex]\mathbf{\frac{\frac{5}{a -3} - 4}{ 2 + \frac{1}{a - 3}}}[/tex]

Start by writing the numerator and the denominator, with a common denominator

[tex]\mathbf{\frac{\frac{5}{a -3} - 4}{ 2 + \frac{1}{a - 3}} = \frac{\frac{5 -4a +12}{a - 3}}{\frac{2a - 6 + 1}{a - 3}}}[/tex]

Cancel out the denominators of both fractions (by dividing the numerators)

[tex]\mathbf{\frac{\frac{5}{a -3} - 4}{ 2 + \frac{1}{a - 3}} = \frac{5 -4a +12}{2a - 6 + 1}}[/tex]

So, we have:

[tex]\mathbf{\frac{\frac{5}{a -3} - 4}{ 2 + \frac{1}{a - 3}} = \frac{17 -4a }{2a - 5}}[/tex]

Hence, the correct option is (a).

Read more about fraction division at:

https://brainly.com/question/17205173

HELP! The value of y is directly proportional to the value of x. Given y = 11 when x = 77. What is the value of y when x = 98?


17

7

686

14

Answers

Answer:

The answer should be 14.

Step-by-step explanation:

14×7=98

what is the answer to -x+7=8

Answers


+
7
=
8
x
+
7
=
8
x+7=8

+
7

7
=
8

7

Solution
X =1

Answer:

-x+7=8

bring the 7 over.

to do so you must subtract 7 from itself (canceling it out), then also subtract it from 8.

now you have -x=1.

divide -x by -x (or -1) which just gives you positive x.

do the same to the 1 on the other side, giving you

x= -1

Step-by-step explanation:

Jana and Tim both sell cleaning products to local housecleaning services. When Jana orders from the manufacturer of the products she sells, she is given a 15% discount on her total purchase, and she must pay a $15 shipping fee. Each of Tim's orders to his manufacturer is charged at 85% of the full purchase price of the products, and he pays a $4 handling fee, plus $11 for shipping. Choose ALL of the statements that are true. When Jana and Tim purchase products having the same total value, their costs for the purchases will always be the same. Jana and Tim will never spend exactly the same amount on purchase orders to their manufacturers. Jana and Tim will only spend the same amount on purchase orders to their manufacturers when they each order products with a total purchase value of $100. If Jana switches to Tim's manufacturer for her product purchases, her cost will decrease. If Tim switches to Jana's manufacturer for his product purchases, his cost will remain the same.

Answers

Answer: Jana and Tim will only spend the same amount on purchase orders to their manufacturers when they each order products with a total purchase value of $100.

Step-by-step explanation:

Jana and Tim would only be incurring same amount when both total purchase is to a value of $100. This is so because by purchasing a goods worth same amount, they both end up incurring $15 dollar additional cost. Jana would spend $15 on shipping her goods, while Tim would pay $4 Handling fees and $11 dollar shipping fee which would also amount to $15. What this means is total spent for both Jana and Tim would amount to $115 each.

1/3 ÷ (-2 2/3)=
what is the answer to this

Answers

Answer:

-0.125 or -1/8

Is (x+3) a factor of P(x)=2X³+5X²+X+10 explain

Answers

Answer:

Doubt it because the answer has to be a factor of 10 but I may be wrong.

When x=1/3 and y=1/6, −2x+8y=

Answers

Answer:

The answer is 2/3.

Step-by-step explanation:

Answer:

2/3

Step-by-step explanation:

-2x+8y

-2(1/3)+8(1/6)

=2/3

Help me what’s the answer.

Answers

Answer:

Answer 3

Step-by-step explanation:

We know if two line pass through each other that the opposite angles will always be equal. Do we know it is simalar and that it is angle angle (aa), not angle side angle (asa). And we can also figur out GHF is similar to KHJ because it is a mirror, unlike JHK.

1 point
6. At five below there is a discount of $5 for every 4 items you buy. If the
receipt show discount of $20 how many items did you buy?*
HINT: This problem is similar to #6, page 90
O A You bought 20 items
B You bought 15 items
C You bought 16 itmes
D You bought 8 items

Answers

c. 5x4=20

4x4=16 items.

The function f(t) = 349.2(0.98)t models the relationship between t, the time an oven spends cooling and the temperature of the oven. A 2-column table with 5 rows. The first column is labeled time (minutes)t with entries 5, 10, 15, 20, 25. The second column is labeled oven temperature (degree Fahrenheit) f(f) with entries 315, 285, 260, 235, 210. For which temperature will the model most accurately predict the time spent cooling? 0 100 300 400

Answers

Answer:

C. 300

We need to find the temperature that most resembles with the model

We can easily see the graph if we plot it using a calculator

f(t) = 349.2(0.98)^t

Case a.  0

Zero is only achievable as the cooling time goes to infinity. This is not the case.

Case b.  100

for f = 100,

t ≈ 61.6,

which is out of the values of the table

Not the correct option

Case c.  300

for  f = 300,

t ≈ 7.5,

which is in range with the values of the table

Answer:

CCCCCC

Step-by-step explanation:

Cassandra's money that she makes from selling cookies can be determined by the equation y = 2X -
20. To not lose money she has to sell over 10 cookies per day but she only makes a batch of 15
cookies each day. What is the range in this situation if she does not lose money?
Answer choices shown in picture. Please help! I put 45 points and i’ll give you a brainliest if it’s correct!

Answers

Answer:

E

Step-by-step explanation:

Because the y-intercept is (0,-20)

Which of the following statements explains how to solve for l using the formula A = lw, when A = 28 1/4 and w = 2 1/2?

1. Subtract 2 1/2 from 28 1/4.
2. Divide 2 1/2 by 28 1/4.
3. Multiply 28 1/4 by 2 1/2.
4. Divide 28 1/4 by 2 1/2.

Answers

Answer:

4

Step-by-step explanation:

you have to reverse the equation is A=lw then to get l you use l=A/w

Answer:

Divide 28 by 2

Step-by-step explanation:

When the variable of interest is multiplied by something, you undo that multiplication by dividing the equation by that something.

Here, l is multiplied by 2, so the solution is found by dividing ...

... 28 = l·2

by 2 to get ...

... 28/2 = l

That is, you divide 28 by 2 to find l.

IF U HELP ME THANK YOU , I need help on this

Answers

Answer: <1 is 46

Step-by-step explanation: If 4x+10+2x-16=180 becuase they are same sided interior angle they have to equal 180. and if you do the process you get X=31 and if you plug it in you get <1=46 and to check it you have to plug it in the other and add thoses two up and see if you get 180. which it does.

explain to "the 6th grader" how to find the area of a square​

Answers

Answer:

You find an area of a square by multiplying the width and the length.

Answer:

you multiply the length by the width.

Step-by-step explanation:

the attached file shows what the length and width are.

graph the line
y+5=1/4(x-3)

Answers

Answer:

Graph

Step-by-step explanation:

Isolate a variable in each system. You may need to use the distributive property to simplify the equation. Show your work.

3x - 4y = -7
4x + 3y = 24

Answers

Answer:

1.  x=-7/3 + 4y/3

2. x= 6- 3y/4

Step-by-step explanation:

to isolate the variable you simply solve for it by moving all the terms which don't contain x to the right by multiplying, subtracting, adding, and dividing

Help me plz nd ty:)
is -13 an integer

Answers

Answer:

yes it is an integer

Step-by-step explanation:

please mark as brainliest

Answer:

YES -13 is an integer

Step-by-step explanation:

It is an integer because integers are whole numbers. This means that it doesn't include decimals, fractions, and irrational numbers. Even though not all negative numbers are integers, this one is, and that is because it is not a decimal, fraction, or irrational number.

Hope this helps! ^^

You type 282 words in 6 minutes.How many words do you type in one minute?

Answers

282/6 = 47 words per minute

Answer:

47

Step-by-step explanation:

282 words in 6 minutes

? in 1 minutes

282÷6=47....

47×6=282

Look at triangle ABC.

Coordinate grid shows negative 5 to positive 5 on the x axis and y axis at intervals of 1. A triangle ABC is shown with A at ordered pair 4, 5, B at ordered pair 2, 1, and C at ordered pair 4, 1.

What is the length of side AB of the triangle?

2
Square root of 20
6
Square root of 38

Answers

Answer:

square root of 20

Step-by-step explanation:

Answer:

sq root of 20

Step-by-step explanation:

WILL MARK BRAINLIEST! PLEASE HELP!
Write 206 in base 7

Answers

Answer:

wut

Step-by-step explanation:

an event is called__ if the probability it will occur equals 0. help me please, i beg you

Answers

Answer:

impossible

Step-by-step explanation:

If there is no chance of something happening, then it is...

Enter the equation of the line in slope-intercept form.

The line parallel to y =
5/4x + 8 that passes through (−8, 0).

The equation of the line that passes through (−8, 0) is y = ???

Answers

Answer:

y = 5x/4 + 10

Step-by-step explanation:

If two lines are parallel, the slopes are equal

The equation of a straight line is y = mx + c

where m is slope and c is y-intercept

So in this case 5/4 is also the slope m of the second line

we can write the equation as;

y-y1 = m(x-x1)

y-0 = 5/4(x + 8)

y = 5x/4 + 10

how do i solve for x​

Answers

That the answer for x

Answer:

x=-27

Step-by-step explanation:

4/7x * 14x = 1/14(14x) + 5/2x(14x)

Multiply both sides by 14x

8 = x+35

-27 = x

What is the final amount if 943 is decreased by 13% followed by a further 6% decrease?
Give your answer rounded to 2 DP.​

Answers

Answer:

943-13% = 820.41

820.41 - 6% = 771.1854

Step-by-step explanation:

Find the length of the shortest side ( rounded to 2DP) if the area of the rectangle is 28m^2

Answers

Answer:

4.39 to 2DP.

Step-by-step explanation:

x * (x - 2) =  28

x^2 - 2x = 28

Solving by completing the square:

(x - 1)^2 - 1 = 28

(x - 1)^2 = 29

x = +/-√29 + 1

x = 6.38516, -4.38516

x must be positive so it = 6.38516.

The shortest side = x - 2 = 4.385.

Write the question, in slope-intercept form, for the line shown in the graph below:

Can some one pls help me in this math problem?

Answers

Answer:

The question, in the slope-intercept form will be:

[tex]y=1(x)+0[/tex]

Step-by-step explanation:

Taking the two points on the line to find the slope

(0, 0)

(4, 4)

[tex]\mathrm{Slope\:between\:two\:points}:\quad \mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]\left(x_1,\:y_1\right)=\left(0,\:0\right),\:\left(x_2,\:y_2\right)=\left(4,\:4\right)[/tex]

[tex]m=\frac{4-0}{4-0}[/tex]

[tex]m=1[/tex]

As the point-slope form is

[tex]y-y_1=m\left(x-x_1\right)[/tex]

where m is the slope

substituting the values m = 1 and the point (0, 0)

[tex]y-y_1=m\left(x-x_1\right)[/tex]

[tex]y-0=1(x-0)[/tex]

[tex]y=x[/tex]

As the slope-intercept form is

[tex]y=mx+b[/tex]

where m is the slope and b is the y-intercept

so writing the equation in slope-intercept form

[tex]y=x[/tex]

[tex]y=1(x)+0[/tex]

Therefore, the question, in the slope-intercept form will be:

[tex]y=1(x)+0[/tex]

Help plz:))) I’ll mark u brainliest
ASAP!!!

Answers

Answer: x=20 degrees

Step-by-step explanation:

Base angle theorem makes angle 2 congruent to the 30 degrees angle.

Make an equation: 2x-10=30

Solve it to get x= 20 degrees.

answer: x=20 degrees



Winston plans to hire a moving company to help him
move. The company charges $80 per hour and a flat
rate of $150 for the truck and packaging materials.
Winston wants to spend no more than $500 on
the total moving costs. If the company charges for
a whole number of hours, what is the maximum
number of hours for which Winston can hire the
moving company?

Answers

The maximum whole number of hours is 4 hours.
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