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3 years ago

Will mark brainliest!!

1 answer:

7 0

Solve the system

9x = 27-9y
20x=71-9y

Let's use the "elimination through addition/subtraction method.
Multiply the first equation by -1 so as to obtain +9y:

-9x = -27 + 9y
20x= 71- 9y
--------------------

Add these 2 equations together:

-9x = -27 + 9y
20x= 71- 9y
--------------------
 11x = 44

Solve this for x: x = 44/11 = 4.

Now find y by subst. 4 for x in either of the original equations.

Using the second equation: 

20x=71-9y
20(4) = 71 - 9y
80-71 = -9y
9 = -9y. Then y = -1.

The solution set is (4,-1).

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Tyra buys 14 gallons of gas for $35. How could she figure out how much 1 gallon of gas cost

defon

Answer:

The cost of 1 gallon is $2.5

Step-by-step explanation:

Given

Cost of 14 gallons = $35

Required

Determine the cost of 1 gallon

From the given parameters, we have:

$14\ gallons = \$35$

Divide both sides by 14

$\frac{14\ gallons}{14} = \frac{\$35}{14}$

$1\ gallon = \frac{\$35}{14}$

$1\ gallon = \$2.5$

Hence,

The cost of 1 gallon is $2.5

4 0

3 years ago

THIS IS MY LAST QUETSION!!!! Please help!!!

DedPeter [7]

Answer:

x=19(rounded) or 18.7882942281

Step-by-step explanation:

a^2+b^2=C^2

8^2+17^2=C^2

64+289= C^2

353=C^2

$\sqrt{353} =\sqrt{C^2}\\$

18.7882942281= C

19= C

7 0

3 years ago

What is the value of Y? Choose the CORRECT answer from the picture ABOVE.

Harlamova29_29 [7]

B y=14 because if you subtract that will give you the answer

8 0

3 years ago

Question:

Tamiku [17]

Answer:

Step-by-step explanation:

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3 years ago

Which of the following illustrates the truth value of the given statements?

Amiraneli [1.4K]

hey i think TT- T but im not sure tell if im right

3 0

3 years ago

Read 2 more answers