Help me please -Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks.

18 + 63 = 81

85% of 81 = 68.85

80 - 68.85 = $11.15 change

please give brainliest

Answer:

5x=45

Step-by-step explanation:

Solve: 4+x=12

~ Subtract 4

~ x = 8

~ (not nine)

-----

Solve: 2x=20

- Divide by 2 (isolate x)

- x = 10

- (not nine)

-----

Solve: x+7=26

~ Subtract 7

~ x = 19

~ (not nine)

-----

Solve: 5x=45

- Divide by 5 (isolate x)

- x = 9

- (Nine! Our answer)

Answer:6

Step-by-step explanation:50/8=6.25, but she obviously can’t buy .25 of a pack, so she can only buy 6

Answer:

6

Step-by-step explanation:

a=bh/2

12=4b/2, simplify = 12=2b/1

divide 2 to both sides

12=2b

6=b

Answer:

6 is the base

Step-by-step explanation:

to find the base, you do

b = 2 × A/h

b = 2 × 12/4 = 6

A = Area = 12

h = height = 4

b = base = 6

Answer:

192?

Step-by-step explanation:

Because 14+10=24 and 24x8=192.

Answer:

C = 24.5 in

Step-by-step explanation:

Formula to find the circumference of a circle is :

C = 2πr

Here,

r ⇒ radius

So let us solve now.

C = 2πr

C = 2 × π × r

C = 2 × 3.14 × 3.9

C = 24.492 in

So, they've asked for nearest 10th.

Therefore, the answer will be 24.5 in.

Hope this helps you :-)

Let me know if you have any other questions :-)

Answer:

[tex]\huge{ \boxed{\boxed{\tt Circumference≈24.5 \: in.}}}[/tex]

Step-by-step explanation:

Given:-

Radius of the circle = 3.9 in.

To Find:-

The Circumference

Solution:-

We know that the formula of Circumference is :

[tex]\boxed{ \sf \: Circumference = 2\pi{r}}[/tex]

Note that r equals to radius which is given.

Now,Put the value of radius (r) :-

[tex] \sf \implies \: Circumference = (2\pi \times 3.9) \; in.\: [/tex]

We know that the value of π is :-

[tex] \boxed{\sf \: \pi = 3.14}[/tex]

So put the value of π :-

[tex]\sf \implies{Circumference} =( 2 \times 3.14 \times 3.9 )in.[/tex]

Simplify this:

Multiply 2 and 3.14 :-

[tex]\sf \implies{Circumference} = (6.28 \times 3.9) \: in.[/tex]

Multiply 6.28 and 3.9 :-

[tex]\sf \implies{Circumference} = 24.492\; in.[/tex]

Hence,the circumference of the circle would be 24.492 in. .

But We are asked to find the circumference to the nearest Tenth.

So,the Nearest Tenth of 24.492 in. is :-

[tex]\sf \implies{Circumference} ≈ 24.5 \: in.[/tex]

Hence, the circumference to the nearest Tenth of the circle would be;

[tex]\boxed{\sf {Circumference} ≈ 24.5\; in.}[/tex]

We're done!

[tex] \rule{225pt}{2pt}[/tex]

I hope this helps!

Let me know if you have any questions.

:)

The equation of line best fir is y = 1.86211x + 4.42878.

Given

The data in the table added to scatter plot and line of best fit calculated using a graphing calculator.

The linear equation is represented in the form of;

y = MX +c

Where m is the slope of the line and y and x are independent variables.

The line of best fit is:

y = 1.86211x + 4.42878

To know more about the Linear equation click the link given below.

https://brainly.com/question/11897796

Answer:

1.875 + 12.2.25

your mom

Answer:

Step-by-step explanation:

y = [tex]\sqrt{x+3}[/tex] - 2

Answer:

= x 3048

Step-by-step explanation:

Answer:

13

Step-by-step explanation:

Answer:

im pretty sure its the same as fraction. 52 as the numerator and 4 as the denominator.

so sorry if im incorrect

Answer:

i think its y = 2.5x ?

Step-by-step explanation:

for every 5 units of black paint, there are 2 units of white paint,, this can be represented as

2y = 5x

divide everything by 2 to isolate y and you get

y = 2.5x

Answer:

B) 4.5

Step-by-step explanation:

The area of the first figure is 10x

The area of the second figure is 6(x+3)=6x+18

To solve, find the x that makes 10x=6x+18

   1) 10x=6x+18

   2) 4x=18

   3) x=4.5

To check work)

   1) 10(4.5)=6(4.5)+18

   2) 45=27+18

   3) 45=45

The distance between points S' and S is x= 2.5 units.

Line segment ST is dilated to create line segment S'T' using the dilation rule DQ 2. 25.

Point Q is the center of dilation.

Line segment ST is dilated to create line segment S prime T prime.

The length of QT is 1. 2 and the length of QS is 2.

The length of SS prime is x and the length of TT prime is 1. 5.

What is x, the distance between points S' and S?

Line segment ST is dilated to create line segment S'T' using the dilation rule DQ, 2.25.

Also, SQ = 2 units, TQ = 1.2 units, TT'=1.5, SS' = x.

Since the line ST is dilated to S'T' with the center of dilation Q, the triangles STQ and S'T'Q must be similar.

We know that the corresponding sides of two similar triangles are proportional.

So, from ΔSTQ and ΔS'T'Q.

[tex]\dfrac{SQ}{S'Q} = \dfrac{TQ}{T'Q}\\ \\ \dfrac{SQ}{SQ+SS} = \dfrac{TQ}{TQ+TT'}\\ \\ \dfrac{2}{2+x} = \dfrac{1.2}{1.2+1.5}\\\rm \\ \dfrac{2}{2+x} = \dfrac{1.2}{2.7}\\\\ \dfrac{2}{2+x} = \dfrac{12}{27}\\\\2(27) = (2+x) 12\\\\ 54 = 24 + 12x\\ \\ 12x = 54-24\\ \\ 12x=30\\ \\ x = \dfrac{30}{12}\\ \\ x = 2.5[/tex]

Hence, the distance between points S' and S is x= 2.5 units.

To know more about Pythagoras Theorem click the link given below.

https://brainly.com/question/16016926

Answer:

B or 2.5 I think

Step-by-step explanation:

Answer:

g^(8)h is may be answer as ithink

Answer:

121

Step-by-step explanation:

[tex]-\frac{u}{11}-4=-15[/tex]

Add 4 to both sides

[tex]-\frac{u}{11}=-11[/tex]

Multiply by -11

u=121

Checking the work)

121/-11-4=-15

-11-4=-15

-15=-15

Answer:

perimeter of the triangle = addition of all sides.

perimeter = 3y + 1 + 4y + 2 + 7y

perimeter =3y + 4y +7y +1 + 2

perimeter = 14y + 3

answer = option a.

Answer:

a

Step-by-step explanation:

The perimeter is the sum of the 3 sides of the triangle, that is

perimeter = 3y + 1 + 4y + 2 + 7y ← collect like terms

                = 14y + 3

Answer:

Simplified expression:

17/36

in decimal form:

0.472

Is this what you need??

Answer: 3 sqrt(21)

Step-by-step explanation:

wow this problem is gross!
making the triangle,

you need to use the law of cosines! searching "law of cosines" online should help a lot!

c^2 = a^2 + b^2 − 2ab cos(C)

you know C = 60 degrees (from 12 pm to 2pm!)

a = 12 cm and b = 15 cm

plug it into the equation and you get

c = 3 * sqrt(21) = 13.748

Answer: √70

Step-by-step explanation:

15^2=12^2 + x^2

225= 155 + x^2

X= √70

Answer:

x=17

Missing angles are 52 and 38.

Step-by-step explanation:

All triangles add up to equal 180 degrees. Using this information we can create an equation to help solve this problem. We are given one of the angles and the other 2 are shown as expressions, so the equation will look like 90+(2x+4)+(3x+1)=180. You can subtract 90 from both sides to simplify the equation to (2x+4)+(3x+1)=90. From here solve for x.

Combine the like terms

Next, subtract 5 from both sides

Then, divide both sides by 5

Then, plug in 17 for x in the expressions to find the missing angles. The top angle is 3(17)+1=52. The bottom angle is 2(17)+4=38.

Answer:

Below:

Step-by-step explanation:

The answer is "B" -44.

Hope it helps...

It's Ms-Muska

Answer:

a = -4,000m + 39,000

Step-by-step explanation:

if you plug in 1 for m you get 35,000 which represents 1 minute it's at 35,000

same goes for if u put 2 you get 31,000

hope this helps :))

Answer:

J; (1, -10)

K; (-1, -10)

L; (1,-8)

M; (-1, -8)

Step-by-step explanation:

I double-checked and they are all right. hope this helps!

Answer:

-27

Step-by-step explanation:

Substitute the numbers in for the variables:

(-9)(-1) — (-9)(-4)

Multiply it out and you'll get:

9 — 36

Then, just subtract:

-27

The interest for six months when the principal is $400 at 6% annual interest paid semi-annually is $12.

The formula for calculating the compound interest is expressed as:

Substitute to have

A = 400(1+0.06/2)^0.5(2)

A = 400(1+0.03)

A = 400(1.03)

A = $412

Interest = $412 - $400

Inetrest = $12

Hence the interest for six months when the principal is $400 at 6% annual interest paid semi-annually is $12.

Learn more on compound interest here: https://brainly.com/question/24924853