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Alex
3 years ago
13

Solve for a 3a+9 = 18 * a = 5 a = 10 a = 3 None of the above

Mathematics
1 answer:
dezoksy [38]3 years ago
4 0

Answer:

A=3

Step-by-step explanation:

3a+9=18

3a=9

a=3

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The formula for a trapezoid relates the area A, the two bases, a and b, and the height, h. A=(a+b)/2 h Solve for a.
yKpoI14uk [10]

Answer:

a=\frac{2A}{h}-b

Step-by-step explanation:

Hello, I think I can help you with this.

According to the information provided in the problem, the area of ​​a trapezoid is given by

A=\frac{a+b}{2} *h\\

Step 1

solve for a, it means isolate a

A=\frac{a+b}{2} *h\\divide\ both\ sides\ by\ h\\\\\frac{A}{h}= \frac{\frac{a+b}{2} *h}{h} \\\frac{A}{h}=\frac{a+b}{2}\\\\Now, multiply\ both\ sides\ by\ two\\\\ 2*\frac{A}{h}=2*\frac{a+b}{2}\\2*\frac{A}{h}=a+b\\\frac{2A}{h}=a+b\\\\subtract\ b\ for\ both\ sides\\\frac{2A}{h}-b=a+b-b\\a=\frac{2A}{h}-b

Have a good day.

5 0
3 years ago
PLS HELP WILL GIVE BRAINLIEST
Oduvanchick [21]

Answer:

60

The angle acute so my guess is 60

Hope this helps :)

6 0
3 years ago
Simplify ----2√45 + 3√3 + 2√3 A~ --18√5 + 5√3 B~ --6√5 + 6√3 C~ --2√5 + 6√3 D~ --6√5 + 5√3
puteri [66]

Answer:

Simplify ----2√45 + 3√3 + 2√3

A~ --18√5 + 5√3

B~ --6√5 + 6√3

C~ --2√5 + 6√3

<u>D~ --6√5 + 5√3</u>

Step-by-step explanation:

[tex]-2\sqrt{45}+3\sqrt{3}  +2\sqrt{3} =-2\sqrt{45}  + 5\sqrt{3} =-6\sqrt{5} + 5\sqrt{3}[/tex

7 0
3 years ago
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Anna11 [10]

The answer for leading coefficient should be 1.

8 0
3 years ago
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Write an equation of a line that passes through (-6, 1), parallel to y = 2x – 6.
Eddi Din [679]

Answer:

y = -1/2x - 2

Step-by-step explanation:

If it's parallel, that means that the slope is the opposite of the one in the given equation, meaning that 2 would be flipped and turned negative into -1/2.

Then, fill in the x and y values to get the y-intercept.

1 = -1/2(-6) + b

1 = 3 + b

-2 = b

So your answer is y = -1/2x - 2

4 0
3 years ago
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