How do you do this question?

How Do You Do This Question?

Answers

Answer 1

Answer:

The answer is D) 12

 

Answer 2

There are two trips, but the distances are the same.

Trip #1: uphill, at 9 mph

Trip #2: downhill at 18 mph

Total round trip is 30 minutes.

Since he's going half the speed uphill, Trip #1 takes twice as long as Trip #2.

So if the time for Trip #2 is x, then the time for Trip #1 is 2x.

     x + 2x = 30, so x=10

Trip #2 takes 10 minutes.

Trip #1 takes 20 minutes.

Trip #1: 20 minutes at 9 mph = 3 miles

Trip #2: 10 minutes at 18 mph = 3 miles

This means his school is 3 miles away.

If you want an equation to solve,

Let d = distance to school.  We use d = r·t formula to set up that t = d/r

let t1 = time going to school and t2 = times going home

t1 + t2 = 30 and t1 = d/9 and t2 = d/18.

    d/9 + d/18 = 0.5    (it's 0.5, because we need the time in hours)

      mutiply both sides b 18

    2d + d = 9

     3d = 9

       d = 3


Related Questions

A number n decreased by 8 is 19

Answers

Answer:

n-8=19

Step-by-step explanation:

The answer is 27 because 19 plus 8 is 27 but if you decrease it by 8 (subtract) it would give you 19 please mark me brainliest hope it helps have a good day

Show how 12 is both a multiple of 4 and a factor of 48. Use words, drawings and symbols to explain your answer

Answers

Answer:

4x3=12

12x4=48

48/12=4

48/4=12

Step-by-step explanation:

It is multie bc four a factor of 12

5 positive integers are arranged in ascending order, as follows:
5, 7, 10, 11, X
The mean and the median are equal.
Find X.

Answers

The answer is: 10.

Explanation: The numbers are in order by the median/lowest to highest so in that case X wouldn't be 7 because the X would have been next to the 7 not on the other side of the 10.

Chris
goes to a shop to buy meat, vegetables and fruit.
(a) The costs of the meat, vegetables and fruit are in the ratio
meat : vegetables : fruit = 2:2:3.
The cost of the meat is $2.40.
Calculate the total cost of the meat, vegetables and fruit.

Answers

Answer:

meat = $2.40

vegetables = $ 2.40

fruit = $2.40 + X

= 2.40 ÷ 2

= 1.2

therefore 2.40 + 1.2

=$3.6 (For fruits )

= $3.6 + $2.40 + $2.40

= $ 8.4

Hope this helps .Plzz mark me brainliest

The total cost of the meat, vegetables and fruit is $8.4.

What is the ratio?

The ratio is defined as the comparison of two quantities of the same units that indicates how much of one quantity is present in the other quantity.

Given that, the costs of the meat, vegetables and fruit are in the ratio meat : vegetables : fruit = 2:2:3.

The cost of the meat is $2.40.

Let the total cost of the meat, vegetables and fruit be x.

Now, 2+2+3=7

So, 2/7 ×x=2.40

2x=2.40×7

2x=16.8

x=8.4

Therefore, the total cost of the meat, vegetables and fruit is $8.4.

To learn more about the ratio visit:

brainly.com/question/13419413.

#SPJ2

These triangles
are congruent by
the triangle
congruence
postulate [? ]
A. SSS
B. SAS
C. Neither, they are not congruent

Answers

Answer:

A

Step-by-step explanation:

The markings indicate that all three sides of each triangle correspond with one another meaning that they are congruent by the SSS (Side, Side, Side) postulate.

C-12=-4show me step by step

Answers

Answer:

C = 8

Step-by-step explanation:

Rearrange the equation to make C the subject.

C - 12 = -4

Add 12 to both sides.

C - 12 + 12 = -4 + 12

C = -4 + 12

C = 8

Check it:

C = 8

So substitute the new found value into the original equation:

C - 12 = -4

8 - 12 = -4

-4 = -4

All good.

Answer:

C = 8

Hope this helps!

Step-by-step explanation:

C - 12 = -4

C - 12 + 12 = -4 + 12    ( Add both sides by 12 )

C = 8      ( Simplify )

Below is a recipe for chocolate chip cookies. The recipe makes 27 cookies. How many teaspoons of vanilla extract do you need to make 24 cookies? Round to the nearest hundredth if needed.

Answers

Answer: 1.78 teaspoons

Step-by-step explanation:

The recipe says: 27 cookies/2 teaspoons Vanilla extract. Let's abbreviation this conversion factor as (27/2)C/V, where C is cookie and V is 1 teaspoon vanilla extract. We have both 13.5C/V and 1V/13.5C as conversion factors. 13.5 cookies is equivalent to 1 teaspoon vanilla, or 1 teaspoon vanilla is equivalent to 13.5 cookies. We can multiply ofr divide either of these factors, since they are both equivalent to 1, and you can mukltiply or divide anything by 1 without changing it's accuracy. The atual numbers will change, but the units will also change, making it a valid result.

We want 24 cookies. Use one of the conversion factors to find the teaspoons vanilla extract required:

1) We can divide by (27C/2V)

24C/((27C/2V) = 1.78 teaspoons

or

2) we can multiply by (1V/13.5C)

24C*(1V/13.5C) = 1.78 teaspoons

I don't understand this question can someone help me with this please, please explain!! and thank you for the help!! If u dont know try your best :D

Answers

First:

A. (First Option)

Second:

C. (Third option)

(Brainiest and thanks are appreciated)

Answer:

Question 3:

O (7 x 50) - (7 x 2) = 350 – 14 = 336

Question 3:

O (9 x 80) + (9 x 1) 729

Step-by-step explanation:

Distributive Property is used in algebraic expressions, to divide the equation, to make it easier to solve. For question 1,  since it was 20, you must subtract 8 from that answer, because 20 is 1 more than 19. For question 2, (2 x 9) + (2 x 3) would be the same thing as 2(9+3).

-kiniwih426

How many faces does a right rectangular prism have if it has 8 vertices and 12 edges?
A. 4 faces
B. 6 faces
C. 8 faces
D. 10 faces

Answers

Answer:

B

Step-by-step explanation:

I think

What unit of measurement is used for liquid volume

Answers

Answer:

What unit of measurement is used for liquid volume? A Liter

6/8 of a gallon of orange juice is left. Six thirsty people want an equal amount of orange juice. How much does each person get?

Answers

Answer:

they each get 1/8 of a gallon of orange juice

Step-by-step explanation:

The value of 10^4 is 10,000. Use this fact to change 5.2 x 10^4 to standard notation. 5.2 x 10^4 = 5.2 x ____ =?​

Answers

Step-by-step explanation:

5.2 × 10000

yep that is the answer

Answer:10,000. i think

Step-by-step explanation: Example: 104 = 10 × 10 × 10 × 10 = 10,000.

find the surface area of a open box of cardboard whose dimensions are 24cm, 18cm and 14cm

Answers

Answer:

hope this helps

Step-by-step explanation:

l = 24 cm

b = 18 cm

h = 14 cm

S.A of cuboid = 2 (l+b) × h

= 2 (42) × 14

= 84 × 14

= 1,176 cm²

pls pls pls help meeee!

Answers

Answer:

x is 90 because it is a right triangle

PlEaSe HeLp.
i'M VeRy CoNfUsEd.

Answers

Answer:

For first page I belive both of the answer are b. The second page I believe b and c

Step-by-step explanation:

Answer:

answers are a,b,a,d

Step-by-step explanation:

help pls what's the answer if I subtract these ?
[tex] \frac{4}{5} [/tex]
-
[tex] \frac{3}{8} [/tex]

Answers

32/40 - 15/40 = 17/40

Answer:

[tex] \frac{17}{40} [/tex]

Step-by-step explanation:

[tex] \frac{4}{5} - \frac{3}{8} [/tex]

First, find the common denominator

So we multiply 4 by 8, and get 32

Then we multiply 3 by 5, and get 15

Next we give both terms new denominators 5 × 8 =40

So now our fractions look like this:

[tex] \frac{32}{40} - \frac{15}{40} [/tex]

Now...that our denominators match we can simply

subtract the numerators

32 − 15 = 17

Thus the answer is:

[tex] \frac{17}{40} [/tex]

Hope this helped you- have a good day bro cya)

(a-b)^2+2c when a=13,b=6,and c=5

Answers

Answer:

59

Step-by-step explanation:

Given: a = 13, b = 6, and c = 5

(13-6)^2+2 x 5 (=10)

(13-6)^2+10

=59

Answer:

59

Step-by-step explanation:

Given,

a = 13

b = 6

c = 5

To find : ( a - b )^2 + 2c

Answer : -

( a - b )^2 + 2c

= ( 13 - 6 )^2 + 2 ( 5 )

= ( 7 )^2 + 10

= 49 + 10

= 59

Therefore,

the value of ( a - b )^2 + 2c is 59.

20% of a number is 17. Find the number.

Answers

Answer:

85

Step-by-step explanation:

20% x X = 17

20/100 x X = 17

X = 17 x 100/20

= 17 x 5

= 85

the number is 85

Answer:

17 is 20% of 85

Step-by-step explanation:

20%= 1/5 so 17 = 1/5 of that number if you multiple 17 by 5 that would equal 85.

17 is 20% of 85

this is algebra 1 id appreciate it if you could help me thx!

Answers

Answer:

Option 4)  y - 1 = -2(x - 0)

Step-by-step explanation:

Given the slope, m = -2, and the y-intercept, (0, 1):

Substitute these values into the following point-slope form:

y - y1 = m(x - x1)

y - 1 = -2(x - 0)  ← This is the point-slope form given the slope, m = -2, and the y-intercept, (0, 1).

Therefore, the correct answer is Option 4: y - 1 = -2(x - 0)

What is the slope of a line that is parallel to the given line

Answers

Answer:

-3/2

Step-by-step explanation:

The slope of a line is calculated by finding the rise over run of two points on the line. In this case, I use the points (-3, 4) and (1, -2). Then, I use the formula of [tex]\frac{y_{2} - y_{1}}{x_{2}- x_{1} }[/tex]  to find the slope. If 4 is [tex]y_{2}[/tex], -3 is [tex]x_{2}[/tex], 1 is [tex]x_{1}[/tex] and -2 is [tex]y_{1}[/tex], then,

[tex]\frac{4 - (-2)}{ -3- 1 } = \frac{6}{-4} = \frac{3}{-2}[/tex]

Furthermore, the slope of a parallel line is always the same as the given line. Therefore, the answer is -3/2.

How do you shift exponential functions?

Answers

Answer:

Shift the graph of f(x)=bx f ( x ) = b x left c units if c is positive and right c units if c is negative. Shift the graph of f(x)=bx f ( x ) = b x up d units if d is positive and down d units if d is negative.

If c-d=7 and c=3-8i what is d
a) -4+8i
b)-4-8i
c)4+8i
d)4-8i

Answers

Answer:

Step-by-step explanation:

c - d = 7

c = 3 - 8i            Substitute into the top equation

3 - 8i - d = 7      Subtract 3 from both sides

- 8i - d = 7 - 3    Combine

-8i - d =4            Add 8i to both sides

-d = 4 + 8i           Multiply through by -1

-1*-d = -4 - 8i

d = - 4 - 8i

Looks like B is the answer.

determine the intercepts of the line 4x-3y=17

Answers

Answer:

x-intercept = 17/4 and y = -17/3

Step-by-step explanation:

To find the intercepts: set x = 0 for the y-intercept and solve the equation and set y =0 for the x- intercept and solve the equation.

To

4x - 3y = 17

4(0) - 3y = 17

0 - 3y = 17

  y = 17 /-3

 y = -17/3 = -5 2/3       y-intercept = -5 2/3.

The ordered pair on the graph is (0, -17/3)

   4x - 3(0) = 17

     4x - 0 = 17

      4x = 17

       x = 17/4       x-intercept = 17/4

    The ordered pair on the graph is (17/4, 0)

can someone help on number 7 and 8
show work please aswell this is due tmr!

Answers

Answer:

In the picture

Step-by-step explanation:

For #8, make sure you combine the like terms on the parantheses due to PEMDAS, then distribute and solve for the variable.

Please help me !!!!!!

Answers

Answer:

2

Step-by-step explanation:

-2+4=2

does anyone know how to do this ​

Answers

Answer:

x = 2 and y =

Step-by-step explanation:

y = 2x - 1

y = -x + 5

2x - 1 = -x + 5

2x + x = 5 + 1

3x = 6

x = 6/3

x = 2

y = 2(3)-1

y = 5

5x(6x2 -3x4+7x3)-20 x3 -3_x4

Answers

Answer:

[tex]30x^3-15x^5+35x^4-43[/tex]

Step-by-step explanation:

[tex]30x^3-15x^5+35x^4-43[/tex]

Use the distributive rule and distribute 5x into the brackets. Then use the order of operation rule to do what is after the brackets.

How do you compare exponential functions??

I really don't understand, also giving brainliest!!

Answers

Answer:

You compare it by this

Step-by-step explanation:

Linear functions are graphed as straight lines while exponential functions are curved. Linear functions are typically in the form y = mx + b, which is used to discover the slope, or simply the change in y divided by the change in x, while exponential functions are typically in the form y = (1 + r) x.

Factor the following Polynomial a) 6x - 18​

Answers

U could easily do this on Photo-math- but here: 6(x−3)
6(x-3) for problems like this i like using math away

Solve for the value of c.

Answers

Right angles = 90 degrees
8c - 5 + 6c - 3 = 90
14c - 8 = 90
14c = 98, c = 7

Solution: c = 7

Step-by-step explanation:

(8c-5)°=(6c-3)°

8c°-5°=6c°-3°

8c°-6c°=-3°-5°

2c°=-8°

c°=-8/2

c°= -4

Substitute the value

{8(-4)-5}

-32-5

-37°

(6c-3)

{6(-4)-3}

-24-3

-27

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