All categories

2 years ago

-3x + 9y=-57 x=4 what is the answer

Mathematics

2 answers:

alexira [117]2 years ago

8 0

-3x+9y=-57 for x=4

-3(4)+9y=-57

Simplify both sides of the equation

(-3)(4)+9y=-57

-12+9y=-57

9y-12=-57

Add 12 to both sides

9y-12+12=-57+12

9y=-45

Divide both sides by 9

9y/9=-45/9

y=-5

I hope that's help !

Gre4nikov [31]2 years ago

7 0

X=4
sub
-3(4)+9y=-57
-12+9y=-57
add 12 both sides
9y=-45
divide 9
y=-5
(4,-5)
y=5

You might be interested in

Lydia is having a party on Saturday she decides to write a riddle order invitations to describe your house number on Cypress Str

Katen [24]

Where is the clues to the question?

7 0

2 years ago

2) Evaluate the given numerical expression. A) 9 B) 12 C) 14 D) 21

eduard

Answer:

$\boxed{\sf{14}}$

Step-by-step explanation:

$\boxed{\underline{\text{ORDER OF OPERATIONS:}}}$

Use the order of operations.

Note: PEMDAS or BODMAS stands for:

PEMDAS

Parentheses
Exponents
Multiply
Divide
Add
Subtract

BODMAS

Brackets
Order
Divide
Add
Subtract

First, do parentheses.

3+6*(5+4)÷3-7

(5+4)=9

$\Longrightarrow: \sf{3+6* 9\div 3-7}$

Do multiply and divide.

6*9=54

54/3=18

Then, rewrite the problem down.

$\Longrightarrow: \sf{3+18-7}$

Add.

$\sf{3+18=21}$

$\sf{21-7=\boxed{\sf{14}}$

$\Longrightarrow: \boxed{\sf{14}}$

Therefore, the correct answer is "C. 14".

I hope this helps, let me know if you have any questions.

8 0

1 year ago

Combine like terms 9y−4

alexgriva [62]

Answer: i dont this you can combine like terms for this question because none of these have the same variable or anything.

5 0

1 year ago

Read 2 more answers

What's 235 divided by 40

Alik [6]

5.875 is the answer

4 0

2 years ago

Read 2 more answers

What is 3 to the power of 8 divided by 3 to the power of 2

Troyanec [42]

Answer:

729

Step-by-step explanation:

hope this helps!

3 0

2 years ago

Read 2 more answers