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3 years ago

Please help 7th grade math question?

Mathematics

2 answers:

xxMikexx [17]3 years ago

8 0

Answer:

11.4

Step-by-step explanation:

Given an expression containing only addition and subtraction, then evaluate from left to right.

12.5 - 2.2 - 1.5 + 2.6

= 10.3 - 1.5 + 2.6

= 8.8 + 2.6

= 11.4

laiz [17]3 years ago

5 0

Answer:

Step-by-step explanation:

Attached file

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3 years ago

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3 years ago

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Nataly_w [17]

Answer:

y = -4x - 11.

Step-by-step explanation:

Its slope = slope of y = -4x + 2, which is -4.

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2 years ago

QUICK!! 18x^2+21x-60=0 pls give me the steps as well

Anton [14]

Answer:

$x2 = \frac{4}{3}$

Step-by-step explanation:

$18 {x}^{2} + 21x - 60 = 0$

Divide both sides of the equation by 3

$6 {x}^{2} + 7x - 20 = 0$

Write 7x as a difference

$6 {x}^{2} + 15x - 8x - 20 = 0$

Factor out 3x from the expression

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$3x(2x + 5) - 4(2x + 5) = 0$

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When the product of factors equals 0 , at least one factor is 0

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Solve the equation for X

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Move constant to R.H.S and change its sign

$2x = 0 - 5$

Calculate the difference

$2x = - 5$

Divide both sides of the equation by 2

$\frac{2x}{2} = \frac{ - 5}{2}$

Calculate

$x 1= - \frac{5}{2}$

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$3x - 4 = 0$

Move constant to RHS and change its sign

$3x = 0 + 4$

Calculate the sum

$3x = 4$

divide both sides of the equation by 3

$\frac{3x}{3} = \frac{4}{3}$

Calculate

$x 2= \frac{4}{3}$

Hope this helps..

Best regards!!

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3 years ago

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