Mathematics High School

Solve the system by substitution.
y = 8x
y = 4x + 8

Answers

Answer 1

Answer:

y = 16

x = 2

Step-by-step explanation:

y = 8x

y = 4x + 8

then, by substitution:

8x = 4x + 8

8x - 4x = 8

4x = 8

x = 8/4

x = 2

y = 8x

y = 8*2

y = 16

Check:

y = 4x + 8

y = 4*2 + 8

16 = 8 + 8

Related Questions

HELP I NEED HELP ASAP

Answers

Answer:

i think its; there  all inequalities

Step-by-step explanation:


Solve the system of linear equations by substitution.
y = -2x + 10
y = x +1

Answers

Step-by-step explanation:

y=14

y=1

thats the answer.

For a theater play, the school sold 120 blue tickets for students and 80 red tickets for adults. What percent of the tickets were sold to students?

Answers

Answer:

Step-by-step explanation:

120+80=200 the total number of tickets

120(student tickets) ÷ 200 (total tickets)= .6 =60%

Answer:

bin

Step-by-step explanation:

bghgghhshshsbabbsnajswjjegvrjrjrhrbrhrriritt

HELP FOLKS PLEASE ( i don't have much time)

Answers

Tan Angle y= 7/4
Tan Angle z= 4/7

Answer:

tan(Y) = 7/4

tan(Z) = 4/7

Step-by-step explanation:

Tangent ratios are the TOA of SOHCAHTOA.

tan( angle ) = opposite / adjacent

Points A, S, and R are ___.

Answers

Answer:

B

Step-by-step explanation:

I'm pretty sure it's B, (please let me know if I'm wrong.)  

Colinear means to be on the same straight line, which they are.  

Coplanar means to be in the same plane, which they appear to be as well.

So yeah I'm pretty sure it's B.  

Identify the slope in the equation y= x - 2

Answers

Answer:

The slope-intercrept from y is = mx+b, where m is the slope and b is the y-intercrept

Step-by-step explanation:

y=x-2

Johnny has a circular flower bed. Its radius is 4 feet. Johnny wants to build a fence around the flower bed. What is the total length of the fence?

Answers

Answer:

25.14 feet

Step-by-step explanation:

The length of the wire would be equal to the circumference of the circular flower bed

Formula for circumference of a circle: 2πr

= 2 x 22/7 x 4 = 25.14 feet

Answer:

25.12 ft.

Step-by-step explanation:

I took the quiz on nearpod.

PLEASE HELP ME!

Solve: system by elimination form

1.
2x + y = 25
3y = 2x - 13
----------------------------------------------------

Answers

2x+y=25
-2. -2
1y=23
1y=1y
Y=23
Here is the answer this is the full answer Im just typing cause the app want me to do

Pls help
My teacher rlly tried to make it fun like girl nah it’s still hella boring

Answers

Your saying you want all 5 of these questions answered?

Solve by Substitution:
3x-2y = 4
y = -2x + 5


YALL PLZ HELP ILL DO ANYTHING

Answers

Answer:x=2

Step-by-step explanation:

3x-2(-2x+5) = 4

3x + 4x - 10 = 4

7x-10 = 4

7x = 14

x = 2

y = -2(2) + 5

y = -4 + 5

y = 1

(x,y) = (2,1)

Can someone help me with this please???...

Answers

Answer:

2×2×2×2× 5

Step-by-step explanation:

use the tree method it helps

Answer:

hey mate this is your answer..

Elliot is riding in a 100-mile bike race to raise money for a charity. So far he has completed 7_10of the race. How far has Elliot biked?

Answers

Answer: He rode 70 miles!!!

Answer:

70 miles

Step-by-step explanation:

Mark me as brainliest

Determine the value of the expression

Answers

This is the answer..........

Which of the following is an equation with ONE solution?

A
2x = 2x + 18

B
2x - 10 = 2(x - 5)

C
5(x + 3) + x

D
2x + 5= 11 - 4x

Answers

D is the answer. I hope this helps!

A circle is drawn inside a square so its circumference touches each of the four sides of the
square. If the area of the circle is 125.8cm2 calculate the length of the sides of the square.

Answers

Answer:

12.66 cm

Step-by-step explanation:

Area of the circle = 125.8 Sq cm

[tex] \therefore \: \pi {r}^{2} = 125.8 \\ \\ \therefore \: 3.14 \times {r}^{2} = 125.8 \\ \\ {r}^{2} = \frac{125.8}{3.14} \\ \\ {r}^{2} = 40.0636943 \\ \\ {r} = \sqrt{40.0636943} \\ \\ r = 6.32958879 \\ \\ r \approx \: 6.33 \: cm \\ \\ d \: = 2r \\ \\ d = 2 \times 6.33 \\ \\ d = 12.66 \: cm \\ [/tex]

Diameter of the circle = 12.66 cm

Since, circumference of the circle touches each of the four sides of the square.

So, length of the sides of the square

= diameter of the circle.

= 12.66 cm

Please help me with this

Answers

Answer:

1 h 30 minuutes

Step-by-step explanation:

[tex]1.5 \: hr = 1 \: hr + 0.5 \times 60 \: min \\ \\ = 1 \: h \: 30 \: min \\ \\ [/tex]

Answer:

1.5 Hrs x 60 minutes = 90 minutes

1 hour 30 minutes

QRST is a parallelogram. Find x, y, and z.

Answers

Answer:

x=5.4

y= 9

z= 11

Step-by-step explanation:

5x= 27

x= 5.4

2y-5=y+4

y=9

3z = 33

z =11

Can some one please help me

Answers

Answer:

8:1

Step-by-step explanation:

Don reads 8 pages a minute. Therefore the amount of pages he could read is 8 and the amount of time it takes is a minute

For which value of m is start fraction 4 over 16 end frction equals start fraction m over 24 end fraction a proportion? A. m = 6 B. m = 8 C. m = 12 D. m = 14

Answers

Answer:

A. M=6

Step-by-step explanation:

Basically, this question is asking you to find m if 4/16 = m/24.

First, 4/16 can be simplified to 1/4. This will make it easier to solve.

You now have 1/4 = m/24.

Multiply both sides by 24 to get 24/4 = m.

Simplify to get m = 6.

need help please will give brainliest

Answers

Answer:

y=1/5x+7

Step-by-step explanation:

Barry bought a wooden board that measured 8 feet in length. He cut off a piece that measured
6 5/9 feet. How much of the board was left?

Answers

B. is the answer i did the test and it was right

Please do number 19 for me.

Answers

angles in triangle add to 180 degrees
20x=180
x=9
Angle ABC is the top one
8x9=72

Answer:

[tex]x = 9[/tex]

[tex]angle \: abc = 8x + 6x + 6x \\ 20x = 180 \\ x = \frac{180}{20} \\ x= 9[/tex]

[tex]plzz \: \: mark \: as \: brainliest[/tex]

6. Draw the graph of the linear equation 3x - y = 3. Hence find the
coordinates of the point where the graph intersects y-axis.

Answers

Answer:

(0,-3)

Step-by-step explanation:

(3/4) to the power of 2

Answers

Answer: 3/16

Step-by-step explanation: hope this helps :)

Answer:

0.5625

Step-by-step explanation:

How do you find the x intercept and y intercept on a graph and when given an equation?

Answers

Answer:

In a graph, the x-intercept will be the point in which the line crosses the horizontal line of the plane.

The y-intercept is found when the line crosses the vertical line of the plane.

In an equation, y = mx + b, the y-intercept is the value of b, and the x-intercept is shown when y = 0. (substitute y for 0 and find the value of x)

A scuba diver dove 40 feet below the surface. He swam up 12 feet to see a unique fish. He followed the fish down 8 feet. Then he followed the fish up 27 feet. How far below the surface is the diver now?

Answers

Answer: 9 feet below the surface.

Step-by-step explanation:

The scuba diver starts 40 ft below the surface. We can represent the position of the scuba diver as:

Position = -40ft

Where the negative sign is because it is below the surface of the water, so

"He swam up 12 feet to see a unique fish."

Now we need to add 12ft

Then his new position is:

Position = -40ft + 12 ft = -28ft

"He followed the fish down 8 feet.

Now we need to subtract 8ft

His new position is:

Position = -28ft - 8 ft = -36 ft

"Then he followed the fish up 27 feet."

Now we add another 27 ft.

The final position will be:

Position = -36ft + 27ft = -9ft

Then the final position of the scuba diver is -9ft, that means that he is 9 feet below the surface.

Solve the inequalities by graphing. Select the correct graph. y> X y<-X​

Answers

Answer:

i think is y>X

Step-by-step explanation:

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Answers

Answer:

A C D

Step-by-step explanation:

Unit rate examples:

70 miles / 1 hour

$1.10 / 1 pound

32 heartbeats / 1 minute

Unit rate will always have 1 as a denominator when put into a ratio. All answers except B have 1 as the rate.

Answer:

what elephant house said I was to late

Step-by-step explanation:

4x – y = 7 3y – 12x = –21

Answers

Answer:

y=4x-7   3(4x-7)-21x=-21     12x-21-12x=-21 -21=-21

Step-by-step explanation:

Step: Solve
4
x
−
y
=
7
for y:
4
x
−
y
=
7
4
x
−
y
+
−
4
x
=
7
+
−
4
x
(Add -4x to both sides)
−
y
=
−
4
x
+
7
−
y
−
1
=
−
4
x
+
7
−
1
(Divide both sides by -1)
y
=
4
x
−
7

Step: Substitute
4
x
−
7
for
y
in
−
12
x
+
3
y
=
−
21
:
−
12
x
+
3
y
=
−
21
−
12
x
+
3
(
4
x
−
7
)
=
−
21
−
21
=
−
21
(Simplify both sides of the equation)
−
21
+
21
=
−
21
+
21
(Add 21 to both sides)
0
=
0

PLS HELP ILL GIVE BRAINLIEST!!

Answers

Answer:

y = -7/2x - 7

Step-by-step explanation:

let me know if you need the steps . . .

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