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3 years ago

Solving systems of equations by substitution -2x-3(6-11)=-7

Mathematics

1 answer:

Papessa [141]3 years ago

3 0

Answer:

Step-by-step explanation:

Simplify both sides of the equation.

Subtract 15 from both sides.

Divide both sides by -2.

x = 11

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Which of these is a numerical expression? 4d 3+7 2m - 5

8_murik_8 [283]

Well 4d is an algebraic term as it has a letter representing a number, 2m - 5 is also an algebraic term. 3 + 7 is a numerical expression as it is merely numbers. hope this helps

6 0

4 years ago

What is the solution to the system of equations? 3x + 10y = -47 5x- 7y = 40<br>Please and thank u

anastassius [24]

Answer:

x=1, y=-5

Step-by-step explanation:

Given equations are:

$3x+10y=-47\ Eqn\ 1\\and\\5x-7y=40\ Eqn\ 2$

In order to solve the equation

Multiplying Eqn 1 by 5 and eqn 2 by 3 and subtracting them

So,

Eqn 1 becomes

15x+50y=-235

Eqn 2 becomes

15x-21y=120

Subtracting 2 from a

15x+50y - (15x-21y) = -235-120

15x+50y-15x + 21y = -355

71y = -355

y = -355/71

y =-5

Putting y= -5 in eqn 1

3x+10(-5) = -47

3x -50 = -47

3x = -47+50

3x = 3

x = 3/3

x = 1

Hence the solution is:

x=1, y=-5

5 0

3 years ago

Read 2 more answers

Write an equation that represents the relationship in the recipe above, using s for cups of soda water and p for cups of pineapp

attashe74 [19]

Answer:

3/4

Step-by-step explanation:

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3 years ago

What is the volume of a sphere with a diameter of 9.1 m, rounded to the nearest tenth of a cubic meter?

Marta_Voda [28]

Answer: 394.6 m^3

Step-by-step explanation:

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3 years ago

Solve for x: |3x + 12| = 18

Alla [95]

Answer:

X = 2 or X = -10

Step-by-step explanation:

We know either3x+12=18or3x+12=−18

3x+12=18(Possibility 1)

3x+12−12=18−12(Subtract 12 from both sides)

3x=6

(Divide both sides by 3)

x=2

3x+12=−18(Possibility 2)

3x+12−12=−18−12(Subtract 12 from both sides)

3x=−30

−30

(Divide both sides by 3)

x=−10

Answer:

x=2 or x=−10

4 0

3 years ago