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Oduvanchick [21]
3 years ago
13

A rectangle has a height of 7 and a width of 2x^2 – 3.

Mathematics
2 answers:
julsineya [31]3 years ago
8 0

Answer:

14x² - 21

Step-by-step explanation:

given for a rectangle,

height = 7

width = 2x² - 3

Area = height x width

= 7 (2x² - 3)

= (2x²) (7) - 3 (7)

= 14x² - 21

Blababa [14]3 years ago
5 0

Answer: 14x² - 21

Step-by-step explanation: Just  trust me i promise u its the answer and besides your probably doing khan academy right now.

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Find the measure of the angle indicated. <br><br> A. 130°<br> B. 142°<br> C. 145°<br> D. 38°
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Step-by-step explanation:

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2x+14= -21-5x<br> Need to find out what x is but a step by step explanation please
adoni [48]
Notice how on both sides of the equation there is one coefficient (number being multiplied by x) and a constant (just a plain number). You want all constants to be on one side and all coefficients on the other. He’s how do to that:
2x+14=-21-5
I am choosing that all constants will be on the right side, so I will do the inverse operation of any constant on the left side to remove it. Here, a constant on the left side is 14. I will subtract 14 from both sides of the equation. Positive 14 minus 14 is zero, so it cancels out and removes it.
2x+14-14 = -21-5x
2x = -35-5x
See how the 14 is now gone? The equation looks much simpler now. Okay next, you can see that there is a coefficient on the “constant side” that I’ve chosen, so I am going to remove that. Negative 5 plus positive 5 equals zero. Do this on both sides of the equation.
2x+5x = -35-5x+5x
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Now the equation is just two numbers. All that is left to do is divide by the last coefficient, 7, in this case.
7x/7 = -35/7
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8 0
1 year ago
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