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garik1379 [7]
3 years ago
10

-0.4a + 3 = 7 a=? please help

Mathematics
2 answers:
AleksandrR [38]3 years ago
7 0

Answer:

a = -10

Step-by-step explanation:

Sphinxa [80]3 years ago
7 0

Answer:

the answer is a = −10

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The Grand Canyon Skywalk at Eagle Point is a horseshoe shaped steel frame with a glass floor looking down to the Grand Canyon be
yulyashka [42]

Answer: It will be needed 864 square feet of glass to cover the Skywalk floor.

Step-by-step explanation: The figure below shows the area in question.

Area of a circle is given by

A=\pi.r^{2}

The walkway is a semicircle. Then, area will be:

A=\frac{\pi.r^{2}}{2}

The area that will be covered with glass is the area between the outer and the inner circles. So, area is

A_{t}=A_{outer}-A_{inner}

A_{t}=\frac{\pi.r_{o}^{2}}{2}- \frac{\pi.r_{i}^{2}}{2}

A_{t}=\frac{\pi}{2}(32.5^{2}-22.5^{2})

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4 0
3 years ago
-3(6 - 3k)<br>I need to Simplify the expression​
sergij07 [2.7K]

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Step-by-step explanation:

If you use the distributive property, you get:

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If you simplify each of them you get:

-18+9k

8 0
3 years ago
Read 2 more answers
8.75 is 0.5% of what number
Otrada [13]

Answer:

1750

Step-by-step explanation:

I put it in an image

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3 0
4 years ago
If a dice is rolled 18 times, how many times is the number 2 expected to come up? *
mart [117]

Answer:

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8 0
3 years ago
ABC is similar to DEF. Find x.
san4es73 [151]
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We apply this scale factor 2.5 to the smaller hypotenuse 10 to jump to 2.5*10 = 25, which is the length of the larger hypotenuse.

3 0
3 years ago
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