Mathematics High School

Solve for x
-2x+8y=20

Answers

Answer 1

Answer:

X=-6

Step-by-step explanation:

-2 times -6= 12          12+8=20

Related Questions

Pls can someone help me expand:(x+5)(x-8) in quadratic equation

Answers

(x + 5)(x - 8)

= x² + {5 + (-8)}x + 5(-8)

= x² - 3x - 40

two times x divide five

Answers

Answer:

2x/5

Step-by-step explanation:

need help please, ASAP

Answers

Answer:

BC ≅ YX and ∠A ≅ ∠X

Step-by-step explanation:

Answer:

the answer is the last one BC is congruent to yz and a and x

Step-by-step explanation:

the lenght of the floor is 32 m longer than its width and there is greater than 200 square meters. you will cover the floor completely with tiles. what will be the possible dimension of the floor?

Answers

Let’s assume the width of the floor is x and the area is a

To figure out the dimensions we need to figure out the value of the variable (x)

This means that the length is xm+32m (the m is for metres) and that the area is a>200m2

Because it says what is the possible dimensions let make the area 201m2

The formula for the area of a rectangle is length times width so the equation we use to figure out the value of x


201=x+x+32

So let’s collect like terms and solve from there
201=2x+32
201-32=2x+32-32
169=2x
169/2=2x/2
84.5=x

Now that we know the value of x is 84.5 we can figure out the length is 116.5m and the width is 84.5m

Therefore the dimensions of the floor is 116.5m by 84.5m

I NEED AN ANSWER ASAP A surveyor finds the angle of elevation to the top of a building to be 75°. He is 20 meters from the base of the building. How tall is the building?​

Answers

Answer: 74.6

we draw a right triangle ABC, have: ∠ABC = 90°,  AB = 20 and ∠BAC = 75°, the height of the building is BC

we also have: tan 75° = BC/AB = BC/20

=> BC = tan 75°. 20 = 40 + 20√3 ≈ 74.6

Step-by-step explanation:

at a school
number of boys:number of girls= 11:9
There are 124 more boys than girls.
Work out the total number of students at the school

Answers

Answer:

Total students  = 1240

Step-by-step explanation:

Boys : girls = 11 : 9

Number of boys  = 11x

Number of girls  = 9x

11x - 9x = 124

       2x = 124

         x = 124/2

        x = 62

Number of boys  = 11x = 11 *62 = 682

Number of girls  = 9x   = 9*62    = 558

Total students  = 682 + 558 = 1240

14 fish out of 100,000 are blue, what would this be as a percentage?

Answers

Answer:

0.014%

Step-by-step explanation:

We need to write 14 out of 100,000 as a fraction. Which makes 14/100,000. Now 14/100,000 as a percent is 0.014%


Match each step of the proof with the justification for the step.
[ Select]
NM -NP; NR bisects ZMNP
ZMNR PNR
[ Select]
V
[ Select]
NRNR
Therefore, ANMRSANPR
[ Select]
ZMSZP
[ Select]

Answers

Answer:

uh

Step-by-step explanation:

I m s o d u m b t h a t i c a n t e v e n d o 1 + 1 s o i n e e d h e l p

Answers

Answer:

1 + 1 = 2

Step-by-step explanation:

:)

Answer:

1 + 1 = 2

Hope it Helps

10) Find the circumference of the circle.
Use a 3.14

Answers

Answer:

50.24

Step-by-step explanation:

2*3.14*8=50.24

2*pi*r= circumference

Please help! :)

Will give brainliest, thank you

Answers

Answer:

y=-3/5x+2

Step-by-step explanation:

slope is -3/5

starting point is 2

Analyze the table showing the number of days and cost of the trip.

Answers

Answer:

The answer is 25

Step-by-step explanation:

What is Fourteen minus four times y is equal to y increased by 4

Answers

The answer i think is 14-4y=y+4

P = $660, R = 9%, T = 2 years
I = ?



((Honestly I don't understand anything, I was busy throwing up while my teacher was showing us how to do it))​

Answers

Answer:

$ 118.80

Step-by-step explanation:

First, converting R percent to r a decimal

r = R/100 = 9%/100 = 0.09 per year,

then, solving our equation

I = 660 × 0.09 × 2 = 118.8

I = $ 118.80

The simple interest accumulated

on a principal of $ 660.00

at a rate of 9% per year

for 2 years is $ 118.80.

Write n times 7 as an expression

Answers

Answer:

7n

Step-by-step explanation:

Answer:

n x 7

Step-by-step explanation:

hope this helps

Someone plz help me with this

Answers

Answer:

2.20 y axis 2years T x axis is the answer

A pack of 8 batteries costs £5.99 How much does each battery cost?

Answers

Answer:

£0.75 is how much each battery costs.

Step-by-step explanation:

£5.99 ÷ 8 = £0.748

Answer:

75 cents

5.99 divided by 8 is .74 which can be rounded to .75 which is also 75 cents

What is 50% of.......55

Answers

27.5 .,. I need 20 characters so just ignore this part lol

What is the slope of a line that passes through the points (2,0) and (6,−12)

Answers

Answer:

slope = -3

Step-by-step explanation:

Slope formula: [tex]\frac{y2-y1}{x2-x1}[/tex]

Given points: (2, 0), (6, -12)

(2, 0) = (x1, y1)

(6, -12) = (x2, y2)

To find the slope, input the two given points into the formula used to find slope:

[tex]\frac{-12-0}{6-2}[/tex]

Simplify:

-12 - 0 = -12

6 - 2 = 4

[tex]\frac{-12}{4} = -\frac{3}{1}=-3[/tex]

The slope of the line is -3.

Hope this helps :)

Can sum1 help me plz
A square garden has an area of 53.29 square meters. What is the length of each side of the garden?

1) 3.8m
2) 7.3m
3) 13.3m
4) 26.6m

Answers

The answer is 3) 13.3m

Answer:

7.3m

Step-by-step explanation:

Area is l * w

The length and width of a square are the same, so that means we can use square root for this problem.

The square root of 53.29 is 7.3

7.3*7.3 = 53.29 (<- to double check)

List all 3-digit numbers which are 19 times the sum of their digits.

Answers

Answer:

114, 133, 152, 171, 190, 209, 228, 247, 266, 285, 399

Step-by-step explanation:

These are all the three-digit numbers that are a multiple of 19.

Answer:

114, 133, 152, 171, 190, 209, 228, 247, 266, 285, 399

PLS GIVE BRAINLIEST

There are 60 students in the school band. 30% of them are sixth graders, 50% are seventh graders, and the rest are eighth graders. a. How many band members are sixth graders? b. How many band members are seventh graders? c. What percentage of the band members are eighth graders? Explain your reasoning.​

Answers

Answer:

there is 12 6th graders 30 7th graders and 12 8th graders and 20% is 8th graders please mark brainlyist


A quadratic function passes through the point (-7, -16) and has a vertex at (-6,
-18). Write the function in the form y = ax2 +bx+c. What are the values of a, b and
c?

Answers

Answer:

4 6 7

Step-by-step explanation:

;-;

Help ???????????????

Answers

Answer:

A

Step-by-step explanation:

use slope formula hope this helps

(-6)(-2)(-1) =

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Answers

-6 times -2 is 12
12 times -1 is -12

HELP MY PARENTS ARGUING ABOUT THIS ASSIGNMENT PLEASE DO THIS HURRY!!!

Answers

I believe the answer are as follows: 1. A 2. B 3. A 4. D 5. B and 6. B

The length of a rectangle is 6 centimeters less than the width. The perimeter is 206 centimeters. Find the width and the length.

Answers

Answer:

34.3333333333

Step-by-step explanation:

A number with three digits will open up this lock. These clues will help you find it before the turkey burns hard as a rock. Drawing a number line might help you too, Enter the number below when you are through! My number has ones, tenths, and hundredths Rounding to the nearest whole number, you get 4 Rounding it to the nearest tenth, you get 3.5 The number of hundredths is greater than 3 7​

Answers

Answer:

7.77

Step-by-step explanation:

nearest one = 4

nearest ten = 0.35

nearest hundreth = more than 37

--4

-3.5

<.37-

+__

7.77

i think thats it. pls dont let turkey roast alive D:

Find the solution of the system of equations.

First equation,

- 2x - 5y = -15

Second equation,

-9x + 15y = -30


Will mark brainliest

Answers

Answer:

the answer to your equation is (5,1) in point form or x=5,y=1 in equation form.

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation. hope this helps. :)

Help please im very lost

Answers

Answer:

pretty sure it is zero

Step-by-step explanation:

There are two x's of the same value so presumably the line is vertical which would mean it has no slope and could only be described as zero

Answer:

Step-by-step explanation:

Find the slope. Use m = y2-y1/x2-x1 form

So, -4-(-17)/-6-(-6)

This = 13/0

Which = undefined.

The slope is undefined.

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