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3 years ago

Help!! Dont know how to do this!

Mathematics

1 answer:

CaHeK987 [17]3 years ago

6 0

Answer:

A=(5D-5h)/4

Step-by-step explanation:

So you need to get a on one side so you subtract h on both sides to eliminate the h on the right side: D-h=4/5 a

now you need to multiply 5/4 on both sides in order to make 4/5 a just a

A=(5D-5h)/4

Hope this helps!

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The radius of Circle A is 6 mm. The radius of Circle B is 4 mm greater than the radius of Circle A. The radius of Circle C is 2

labwork [276]

Answer:

Area of circle A =113.14 mm²

Area of circle b = 314.29 mm²

Area of circle C = 452.57 mm²

Area of circle A = 254.57 mm²

2.25 times

Step-by-step explanation:

Area of a circle = nr²

where n = 22/7

r = radius

Circle A's radius = 6mm

Circle B's radius = 6mm + 4mm = 10mm

Circle C's radius = 10mm + 2mm = 12mm

Circle D's radius = 12mm - 3mm = 9mm

Area of circle A = (22/7) x 6² = 113.14 mm²

Area of circle b = (22/7) x 10² = 314.29 mm²

Area of circle C = (22/7) x 12² = 452.57 mm²

Area of circle A = (22/7) x 9² = 254.57 mm²

Number of times the area of circle D is greater than that circle A = Area of circle D / Area of circle A

254.57 mm² / 113.14 mm² = 2.25 times

4 0

3 years ago

8m^3 - 28m^2 + 6m - 21. You solve by factoring by grouping!!! quick please

Leya [2.2K]

Answer:

$(2m - 7)(4 {m}^{2} + 3)$

Step-by-step explanation:

$8m^3 - 28m^2 + 6m - 21 \\ = 4 {m}^{2} (2 {m} - 7) + 3(2m - 7) \\ = (2m - 7)(4 {m}^{2} + 3)$

4 0

3 years ago

0.09×0.7 help me please

dem82 [27]

0.09x0.7= 0.063

That its the answer

7 0

4 years ago

In January, Angelina made one deposit of $90 to her savings account and made 3 withdrawals of $40 each. What was the total chang

Anna71 [15]

So 90 - (40*3) right ?

5 0

4 years ago

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the vertex form of the equation of a parabola is y=(x-5)2+16. what is the standard form of the equation

Reika [66]

Answer:

y = x² - 10x + 41

Step-by-step explanation:

The standard form of a quadratic is ax² + bx + c : a ≠ 0

Given

y = (x - 5)² + 16 ← expand (x - 5)²

= x² - 10x + 25 + 16

= x² - 10x + 41 ← in standard form

6 0

4 years ago

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