Solve the system of linear equations by substitution.
x + 4y = 30
y = −x + 9


The solution of the system is (___, ___).

Answers

Answer 1

Answer:

hey! This was the only part of mathematics I ever enjoyed! So consider this both of our lucky days: Answer is : (2,7)

Step-by-step explanation:

basically plug in Y to the first equation as sox + 4(-x + 9) = 30

x - 4x + 36 = 30- 3x = - 6

x = 2

then plug that in to Y!

Y = -(2) + 9

so Y = 7

and our answer is : (2,7)

Answer 2
Plug in -x+9 in for y and you should get (2,7)

Related Questions

pls help ill mark brainliestttt

Answers

Jfjdhdhfhdhdhfhfhffjfhfhfjfjfjfjfhfh
16. (x + 7) x 5
17 . i’m not sure but i have an idea
8 + x (spongebobs age) = y (patrick’s age)
2x - 3 = w (mr crabs age)
w + y + x = sum of their ages

In Nancy's class, 11/18 of the girls have brown eyes, 2/9 of the girls have blue eyes, and 1/6 of the girls have hazel eyes. How many of the girls have either blue or brown eyes? [Note: Write your answer in simplest form.]

13/18
13/27
5/6
15/18

Answers

Answer:

15/18

Step-by-step explanation:

Please help me with this I will give out extra points with the brain this math question
3/5 image below.

Answers

Answer:

D)

Step-by-step explanation:

The hypotenuse is a bit longer than that of the longer side.

Say, 17 miles.

15+8+17

23+17

40

40 is equal to D.

Hope this helped!

You'd have to find the length of C using the Pythagorean theorem.
So 15^2 + 8^2 = c^2
64 + 225 = c^2
289 = c^2
find the square root of each side
17 = c
You then add each side 15 + 8 + 17 which equals to 40 so 40 miles total !!

The adult height of a male is about 1.19 times his height at age 12. The adult height of a female is about 1.07 times her height at age 12. Predict how tall is Miguel and Ramona will be as adults if Miguel is 1.5 m and Ramona is 1.6 m. Predict how tall you will be.

Pls help me I don't understand how to get how yall I will be and I think I did the first part right but not too sure.

Answers

If you are 12 years old, just measure your own height, then multiply your height by 1.19 if you’re a male, or 1.07 if you’re a female.

The height of Miguel as an adult is 1.785 m.

The height of Ramona as an adult is 1.712 m.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

The adult height of a male is about 1.19 times his height at age 12.

The adult height of a female is about 1.07 times her height at age 12.

Now,

Miguel:

Height at the age of 12 = 1.5 m

The height when he is an adult.

= 1.19 x 1.5

= 1.785 m

Ramona:

Height at the age of 12 = 1.6 m

The height when she is an adult.

= 1.07 x 1.6

= 1.712 m

Thus,

The height of Miguel and Ramona as adults are 1.785 m and 1.712 m.

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How many times larger is a kilo than a deka.

Answers

A deka is is equal to 10 units for ever 1000 kilo units

Which of the following equations is equivalent to 3(a - 5) = 4a ?

Answers

Answer:

2a = 15- a ..................

3(a-5)=4a
3a-15=4a
+15=+15
3a = 19a
•3. •3
=6

Enter an equation for the word sentence. Use the variable c for the cost.

Three times the cost is $18.

Answers

Answer

3x6=18 or 3c=18

Step-by-step explanation:

I don't know in what level of mathematics you're in. It depends...

c= cost  c=6

Answer:

3c=18

Step-by-step explanation:

3c=18

Gerald is testing a computer graphics program. He needs to insert a parabolic shape by transforming the quadratic parent function, f(x) = x2. Gerald needs the parabolic shape to open downward, stretch vertically by a factor of 2, shift right by 3 units, and shift down by 4 units. Which transformed function should Gerald enter into the computer graphics program to achieve this result?
g(x) = –2(x – 3)2 – 4
g(x) = 2(x – 3)2 – 4
g(x) = –2(x + 3)2 – 4
g(x) = 2(x + 3)2 – 4

Answers

Yup 542 yup I’m back on my drip 6432

Function, Gerald should enter to the computer is g(x) = -2(x + 3)² - 4

Correct option is C.

What is transformation?

Transformations are changes done in the shapes on a coordinate plane by rotation or reflection or translation.

Given,

Parent function f(x) = x²

g(x) = ?

Parabolic shape to be downward, meaning reflection over x- axis

for reflection over x - axis,

g(x) = -f(x)

g(x) = -x²

Stretch vertically by factor 2.

For vertical stretch of factor a.

g(x) = a f(x)

g(x) = -2x²

Shift right by 3 units

For right shift by a

g(x) = f(x + a)

g(x) = -2(x + 3)²

Shift down by 4 units

Shift down by b units

g(x) = f(x) - b

g(x) = -2(x + 3)² - 4

Hence, g(x) = -2(x + 3)² - 4 is the function, Gerald should enter.

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what is the circumference of a circle with a radius of 6. (Its not 37.7. )

Answers

Answer:

C≈37.7

r Radius

Solution

C=2πr=2·π·6≈37.69911

It’s C=37.7...............

help solve, thank you much yall

Answers

Answer:

A

Step-by-step explanation:

it's absolute value so it should be A

HELP PLS !! The figure below has a point marked with a large dot. First, translate the figure 8 units to the left. Then, give the coordinates of the marked point in the original figure and the final figure.​

Answers

Answer:

original (4,1)

Final (4,-7)

Step-by-step explanation:

The y axis stays the same and I just move the x axis 8 to the left.

oh i see it now the answer is

(3,3)

solve the equation , (x+ 7)+3y

Answers

Answer:

Step-by-step explanation:

3y + x +7

I guess we are simplify it the answer is x + 3y+7 and if not rearranging terms it x+7+3y

Meg described four triangles as shown below: Triangle P: All sides have length 7 cm. Triangle Q: Two angles measure 55°. Triangle R: Two sides have length 8 cm, and the included angle measures 60°. Triangle S: Base has length 8 cm, and base angles measure 55°. Which triangle is not a unique triangle? Triangle P Triangle Q Triangle R Triangle S

Answers

Triangle P isn't unique because all sides are equal and all interior angles are equal.

  Answer:

The triangle which is not a unique triangle is:

                  Triangle Q.                

can someone please do this on a separate piece of paper if your helping me with the whole page if not can you just type the answer for number 2 it would be very helpful! i will give a brainlist

Answers

Answer:

50 dog walks in 10 hours (1 month)

Step-by-step explanation:

If Darius made 10 dog walks in 2 hours,   then in one month, it took Darius  10 hours to make 50 dog walks.

Using the first formula,    2 hours ÷ 1/5 = 10, then

                                        10 hours (in one month)  ÷  1/5 = 50 dog walks.

Hope this helps!

In problem #1,  rewrite the problem using the reciprocal (the inverse) of 1/5 to 5/1  and change the division sign to multiplication.  Do this for both equations.

Problem 1.)   Write 2 ÷ 1/5  =  2 x 5/1 = 10.

Problem 2.)   10  ÷ 1/5 = 10 x 5/1 =50.

Problem 3.)  Just explain that in one month, it took Darius 10 hours to walk 50 dog walks using the formula from problem 2 above. Good Luck!

Use elimination to solve the system 5x + 4y = -10 and 3x + 6y = -6 for y. Please show work!!! Will give brainliest!!!

Answers

Answer:

y=-5/2-5x/4 and y= -1-x/2

Step-by-step explanation:

hope this helps!! i provided a check. the answer would be C, y = 0.

plz help i will mark brainliest

Answers

Answer:

1. -|12|

2. -5

3. -1

4. |-1|

5. 12

Step-by-step explanation:

1. -|12|
2. -5
3.-1
4.|-1|
5.12

Main street Auto Leasing has a ratio of cars to trucks that is 9:4.

Airport Auto Leasing has a ratio of cars to trucks that is 5 to 3.
If each leasing center has 24 trucks, which auto leasing company has more cars?

Main Street Auto Leasing has more cars since it has ______ cars while Airport Auto Leasing has ____ cars only.

Answers

Answer:

I hope you understood! Good luck with the rest of your class :)

Main Street Auto Leasing has more cars since it has more cars while Airport Auto Leasing has less cars only.

What is mean by Ratio?

A ratio indicates how many times one number contain in another number. The ratio of two number is written as x : y, which is equivalent to x/y. Where, x and y are individual amount of two quantities. And, Total quantity gives after combine as x + y.

Given that;

Main street Auto Leasing has a ratio of cars to trucks that is 9:4.

And, Airport Auto Leasing has a ratio of cars to trucks that is 5 to 3.

Here, Each leasing center has 24 trucks.

And, Main street Auto Leasing has a ratio of cars to trucks that is 9:4.

Hence, Number of trucks in Main street Auto Leasing is,

⇒ 4x = 24

⇒ x = 6

So, Number of cars in Main street Auto Leasing is,

⇒ 9x

⇒ 9 × 6

⇒ 54

Here, Airport Auto Leasing has a ratio of cars to trucks that is 5 to 3.

Hence, Number of trucks in Airport Auto Leasing is,

⇒ 3x = 24

⇒ x = 8

So, Number of cars in Airport Auto Leasing is,

⇒ 5x

⇒ 5 × 8

⇒ 40

Hence, Main Street Auto Leasing has more cars since it has more cars while Airport Auto Leasing has less cars only.

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An item is regularly priced at $27. It is now priced at a discount of 45% off the regular price. Find the price now

Answers

The answer would be $12.15

what what is the answer to q 5

Answers

D (4,-3) because it’s (x,y)
It’s D or (4,3) because on a coordinate plane there’s (x,y) so it x is first and that’s (4,3)

Emilia needs to make 15 batches of blueberry scones this weekend for her family's brunch party. She needs 2 cartons of blueberries for each batch, and each carton costs $4.

How much money Emilia would spend on baking the batches of scones?

Answers

Answer:$120

Step-by-step explanation:

15 batches x 2 cartons of blueberries = 30 cartons

30 cartons x $4.00= $120.00

A EZ one
......
(^.^)

Answers

Answer:

so depending on how many hotdogs he sells you have a profit. so replace H with a number a you will have a ptofit.

Step-by-step explanation:

p=2h

if he sells 2 hotdogs

p=2x2

p=4

and so on...

Need points!! Sorry much love

Math question 2 and Look at the picture below to answer. If u answer correctly i will mark you as brainliest!

Answers

The correct graph for the equation is A
Yup it is The correct answer is A

3. Use powers to rewrite these problems:

a. y y y y y y

b. 7 * 7 * 7 * 7 * n n n n n * m

c. y y * y y

d. t * t * t * t

Answers

A=Y^6
B=7^4•n^5•m
C=y^4
D=t^4

Systems Of Equations:
y=7
y=-2x+1
What is the coordinate that they meet?

Answers

Answer:

(-3, 7)

Step-by-step explanation:

7 = -2x + 1

2x = 1-7

x = -6/2

x = -3

y = 7

(-3,7) should be correct if I did my math right hopefully good luck tho

this one is mildish please hepl

Answers

-18 -9 0 9 18 this good?

Need help ASAP! For math SAT tmrw plz help!!

Answers

3. 60%

4. 5/8

5. 5/25

6. 62%

7. 70%

8. 40

9. 9

10. 22.5%

11. 70

12. i dont know that one sorry.

13. Written as an equation: Y = P% * X.

The 'what' is Y that we want to solve for.

Remember to first convert percentage to decimal, dividing by 100.

Solution: Solve for Y using the percentage formula. Y = P% * X.

Step-by-step explanation: just switch up a few words here and there on 13 and you should be good to go!

Please Answer below!!!

Answers

Answer:

C

Step-by-step explanation:

Type "me"if you're religion is Christian.​

Answers

Not me. *laughs in atheist*

Answer:

me

Step-by-step explanation: well my mom is

Which of the following multiplication problems has a product that is less than 25? Select 3.

Answers

Your is answer is gonna be a

How long is the base of a parallelogram if it has an area of 120 square inches and a height of 10 square inches?
Question 1 options:


130 inches


12 inches


1,200 inches

Answers

Answer:

Your answer should be 1,200 because 120 x 10 is 1,200

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