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2 years ago

what is the area of a triangle if the base is 7 less than 5 times a number and the height is 3 times the number and eight

Mathematics

1 answer:

Flauer [41]2 years ago

6 0

Area of a triangle is half multiplied by the height multiplied by the base.So multiplying the two together and halfing is shown below

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4x2 + 8x - 7 - (3x2 - X+9)

Andreas93 [3]

Answer:

Step-by-step explanation:

$4 {x}^{2} + 8x - 7 - (3 {x}^{2} - x + 9)$

When there is a (-) in front of an expression in parentheses, change the sign of each term in the expression:

$4 {x}^{2} + 8x - 7 - 3 {x}^{2} + x - 9$

Collect like terms

$4 {x}^{2} - 3 {x}^{2} + 8x + x - 7 - 9$

${x}^{2} + 9x - 7 - 9$

Calculate

${x}^{2} + 9x - 16$

Hope this helps...

Good luck on your assignment...

5 0

2 years ago

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Which expression is equal to 1/8000 written in scientific notation?

Shkiper50 [21]

Since 1/8000 is 0.000125, we can move the decimal 4 terms to the right.

So that will be 1.25 • 10^-4
Choice B

5 0

2 years ago

On a piece of paper, graph y>-2x-2. Then determine which answer choice matches the graph you drew.

Svetlanka [38]

Answer:

Graph B

Step-by-step explanation:

Hope this helps

4 0

2 years ago

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<img src="https://tex.z-dn.net/?f=%5Csf%20x-5%3D16" id="TexFormula1" title="\sf x-5=16" alt="\sf x-5=16" align="absmiddle" class

scZoUnD [109]

Answer:

Step-by-step explanation:

7 0

2 years ago

1. What is the solution set for -4x - 10 ≤ 2 ?

tresset_1 [31]

Answer:

x≥−3

Step-by-step explanation:

−4x−10≤2

Step 1: Add 10 to both sides.

−4x−10+10≤2+10

−4x≤12

Step 2: Divide both sides by -4.

−4x−4≤12

−4

x≥−3

5 0

2 years ago