Equations of straight lines are in the form y = mx + c (m and c are numbers). m is the gradient of the line and c is the y-intercept (where the graph crosses the y-axis).

7 0

2 years ago

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Combine like terms - y + 9z - 16y - 25z + 4

alexandr402 [8]

$- 17y - 16z + 4$

Step-by-step explanation:

1) Collect like terms.

$( - y - 16y) + (9z - 25z) + 4$

2) Simplify.

$- 17y - 16z + 4$

So, therefor, the answer is -17y - 16z + 4.

8 0

2 years ago

What is the area of the following trapezoid in square feet?

tangare [24]

Answer:

82.5 ft²

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = $\frac{1}{2}$ h (b₁ + b₂)

where h is the perpendicular height and b₁, b₂ the parallel bases

Here h = 7.5, b₁ = 7 and b₂ = 15 , then

A = $\frac{1}{2}$ × 7.5 × (7 + 15) = 0.5 × 7.5 × 22 = 82.5 ft²

4 0

2 years ago

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