Mathematics High School

Solve each system by substitution.
y=-4x-9 y=3x+19

Answers

Answer 1

Answer:

x=-4, y=7

Step-by-step explanation:

According to the first equation, y = -4x - 9, so we can substitute y in the second equation for -4x - 9.

y = 3x + 19

-4x - 9 = 3x + 19

Add 9 to both sides

-4x = 3x + 28

Subtract 3x

-7x = 28

Divide by -7

x = -4

Plugging this into the equation, we have:

y = -4x - 9

y = -4(-4) - 9

y = 16 - 9

y = 7

Related Questions

could someone please help and fast?

Answers

Answer:

x=28

Step-by-step explanation:

Answer:

x=28

Step-by-step explanation:

50 - 22 = 28

Please mark as brainliest.

Write v as a matrix that could be used in transformation calculations.

Using the matrix at the right that represents​ rectangle ABCD, list the coordinates of C:

Answers

Answer:

1. A

2. C: (8, -5)

Step-by-step explanation:

edge

1. A

2. c

Step-by-step explanation:

edge 2021

what is 1.0×10 to the power of 14 in scientific notation

Answers

Answer: 100,000,000,000,000

Step-by-step explanation:

1.0 x 10^14

since the exponent is positive that means we move the decimal to the right 14 times and you should get 100000000000000.0

Can you solve the equation?

Answers

Answer:

x=3 and 9

Step-by-step explanation:

; x-3=0

x=3 (change side change mark)

and

[tex] \frac{2}{3} x - 6 = 0[/tex]

[tex] \frac{2}{3} x = 6[/tex]

[tex]x = 6 \times \frac{3}{2} [/tex]

change side change mark.

So, x=9

If u wanna check the answer you can check by substitution x=3 and 9 in equation.

hope it helps you ☺️

3) In June a gallon of gasoline cost $2.75. In July the price increased to
$2.92. What is the percent of increase of a gallon of gasoline from June to
July? Round to the nearest tenth.

Answers

Answer:

6.2%

Step-by-step explanation:

Hard to explain, but easy. Take your new value, and subtract your initial (starting) value from the new value. In this case, it would be 2.95-2.75= 17. You now can take you difference (17) and divide it by the initial value, so 17/2.75. This gives you 6.181818182. Round to 6.2%

Help please 878777056586

Answers

Answer:

The answer is 3

Step-by-step explanation:

Because 4x6=24

2x2x2=8

24 divided by 8=3

Hope this helped and have a great day!

PLEASE HELP ME QUICK!!

Pythagorean Theorem

a=33, b=?, c=44.1

A) 858.5

B) 11.1

C) 1024

D)29.3

Answers

Answer:

d

Step-by-step explanation:

44.1^2-33^2=855.81

sqrt of 855.85 = 29.25423046

round to the nearest tenth to get 29.3

What is it’s area !?plz answer fast

Answers

the correct answer is b

Please help will give Brain!!

Answers

Answer:

its 35

Step-by-step explanation:

look at the triangles see how the lines are the same amount? its dilation meaning it is still 35 but a smaller triangle at the process.

114.3 is what percent of 288? Round to the nearest hundredth. Please don’t get this wrong.

Answers

Answer:

39.69%

Step-by-step explanation:

Hope this helps!!

What is the slope? ASAP!!!

Answers

Answer:

2/1 I think but i don't know

Will give brainlist if right! Number 13 and 14 plz

Answers

Answer:

13 - 14

14 - base area 30 and height 19

base area 285 and height 2

Step-by-step explanation:

1428/17/6=14

The perimeter of a quadrilateral garden is 4x2+3x-4. The first side is represented by x2+2x+15. The second and third sides are each represented by x2-x-10. What expression represents the fourth side? Write a justification of your result.

Answers

Answer:

[tex]y = x^{2} + 3x + 1[/tex]

Step-by-step explanation:

Perimeter equals the sum of the lengths of the sides.

Let y = the length of the fourth side

[tex]4x^{2} + 3x - 4 = x^{2} + 2x + 15 + x^{2} -x - 10 + x^{2} - x - 10 + y[/tex]

[tex]4x^{2} + 3x - 4 = 3x^{2} - 5 + y[/tex]

[tex]x^{2} + 3x + 1 = y[/tex]

[tex]\frac{\sqrt[3]{60} }{\sqrt[3]{36} }[/tex]

Answers

∛60
--------
∛36

=
∛5
------
∛3

=∛45
-----------
3

= 1.185

Find the sum
3 2/6 plus 1 3/6

Answers

Answer:

4 5/6

Step-by-step explanation:

3 2/6 plus 1 3/6

3 + 1 = 4

2/6 + 3/6 = 5/6

4 + 5/6 = 4 5/6

Answer:

4 5/6

Step-by-step explanation:

you start with the whole numbers, and 3+1 is 4 so we know that we need to add 4 to the sum of the fractions. next we need to add 2/6 and 3/6, to do that we just add the numeraters and we get 5 so it's 5/6. lastly we need to add the two numbers together and because we didn't get an improper fraction the answer is 4 5/6.

The coordinates
(
−
2
,
−
3
)
(−2,−3) lie on line
r
r. Which equation could represent line
r
r?

Answers

Answer:

A y = -12x – 21 By = -2x – 7 O y = 5x – 7 D y = -2x – 1

Step-by-step explanation:

HOPE THIS HELPS !! <3

An 80 meter rope is suspended at its two ends from the tops of two 50 meter flagpoles. If the lowest point to which the midpoint of the rope can be pulled is 36 meters from the ground, then the distance, in meters, between the flagpoles is:
A. 6√39
B. 36√13
C. 12√39
D. 18√13
E. 12√26
Please ignore the other doodles in the picture

Answers

Answer:

qwerty

Step-by-step explanation:

36 m above the ground is 14 m below the top of the pole.
distance between poles = 2√[40²-14²]
= 12√39

You are starting a lawn mowing business to earn
enough money to buy a new video game system,
which costs $500. You already have $150 saved
from last summer.
You earn $9.50 per hour.

Answers

Answer:

is the question asking how long would it take to make enough? if so the answer is 37 hours

Step-by-step explanation:

500 - 150 = 350

350 ÷ 9.50

=36.8421052632

(round up)

=37 hours

I need help please, I need the answer, I am not good at math :(

Answers

Um u think it might be um I am probably wrong but try 10

Find three consecutive integers with a sum of -45.

Answers

Answer:

-14 + -15 + -16 = -45

Step-by-step explanation:

These are three consecutive integers that equal -45

Help I'm justing learning about this and I don't know what to start or do​

Answers

it’s C!! don’t listen to the first answer. all you have to do it count how many zero’s there are

In a right triangle ABC, C is the right angle. What does sinA equal?
A) cos(90°- A)
B) sin(90°- A)
C) cosB
D) Both A and C are correct

Answers

D it’s both pretty sure

find the length of the missing side Geometry

Answers

7.

Since it is a right triangle we can use Pythagorean Theorem to solve.

A^2+B^2=C^2

We are given C and B. We are solving for A, so we can input what we know.

A^2+24^2=25^2

A^2+576=625

A^2=49

A=7

Therefore, the missing side is equal to 7.


Five whole numbers are written in order.
4 6 x y 10
The mean and median of the five numbers are the same.
Work out the values of x and y.

Answers

x = 7
y = 8
As 7 is the median as it would be the middle number and the mean would now be 7 as well

what is 4 1/3 divided by 4/7​

Answers

Answer:

91/12

Step-by-step explanation:

this is all i can help you with.

Carol spends 11 hours in a 4-week period practicing her culinary skills. How many hours does she practice in 5 weeks?

Answers

Answer:

13.75 hours

Step-by-step explanation:

If she spends 11 hours in a 4 week practice

then she pends X hours in 5 weeks

11 hours = 4 weeks

X hours = 5 weeks

11 x 5 =4x X

55=4X

X = 55/4

X =13.75 hours

You work at a frozen yogurt shop during the summer. You need to order 5-ounce and 8-ounce cups. The storage room will only hold 10 more boves. A box of 5 ounce cups cost $100 and a box of 8-ounce cups costs $150. A maximum of 1200 is budgeted for yogurt cups. Write a system of linear inequalities that shows the number of bonus of 5 ounce and 8 ounce cups that could be bought. Graph your result​

Answers

Answer: 5 Boxes

The way i did it: f+e =10

Value equation...:100f+150e=1250

Modify:100f+100e=1000

Substract the 1st from the 2nd to solve for e

50e=250

e=5 boxes

f+e=10 so f equals 5 boxes


A rectangular yard contains a 120-square-foot garden. If seeds are scattered uniformly over the yard, what is the
probability that a seed lands in the garden?
67%
80%
83%
90%

Answers

Answer:

Did you ever figure it out if so pls tell me

Step-by-step explanation:

0.064 juta
A 6400
B 64 000
C 640 000
D 6 400 000​

Answers

Step-by-step explanation:

1 juta = 1.000.000

0,064 juta = 64.000

A sailboat travels at an average speed of 8 km/h. How many kilometers are traveled in 20 h at that speed?

Answers

160 km because 20 hours times 8 km per hour
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