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3 years ago

Help agaaain on this area

Mathematics

1 answer:

slava [35]3 years ago

8 0

Answer:

12cm²

Step-by-step explanation:

4×4=16. This is the area of the shaded region PLUS the unshaded region.

2×2=4. This is the area of the unshaded region.

Subtract unshaded from shaded. 16-4=12.

The area is 12cm²

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Viktor [21]

Root root 20^2 - 4^2
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3 years ago

Pls show work?!!!!!!!

Paraphin [41]

Answer: 55.5 (A.)

Step-by-step explanation:

Since angle A = 29 and angle B = 41, angle C must be equal to 110

180 = m<A + m<B + m<C

180 = 29 +41 + m<C

180 = 70 + m<C

110 = m<C

Therefore, side c must be the longest, side b must be the second longest, and side a must be the shortest.

Since side length a, angle A, and angle B are known, one can use the law of sines to solve for side b.

Law of Sines: sinA/a = sinB/b = sinC/c

sinA/a = sinB/b

sin29/41 = sin41/b

b(sin29/41) = sin41

b = 41(sin41)/(sin29)

b = 55.48

b = 55.5

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3 years ago

$1400 deposit that earns 10% annual interest compounded semiannually

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Answer:Does this helpf(t) = 1400(1 + (0.1)/2))2t

Step-by-step explanation:

3 0

3 years ago

What is the center of the ellipse x2+5y2–45=0?

jeka94

Answer:

Center is at (0,0)

Step-by-step explanation:

An equation of ellipse in standard form is:

$\displaystyle{\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2} = 1$

Where center is at point (h,k)

From the equation of $\displaystyle{x^2+5y^2-45=0}$ . First, we add 45 both sides:

$\displaystyle{x^2+5y^2-45+45=0+45}\\\\\displaystyle{x^2+5y^2=45}$

Convert into the standard form with RHS (Right-Hand Side) equal to 1 by dividing both sides by 45:

$\displaystyle{\dfrac{x^2}{45}+\dfrac{5y^2}{45}=\dfrac{45}{45}}\\\\\displaystyle{\dfrac{x^2}{45}+\dfrac{y^2}{9}=1}$

Therefore, the center of ellipse is at (0,0) since there are no values of h and k.

8 0

2 years ago

How many 3/4 foot lengths of pipe can be cut from a 7 and 1/2 foot pipe?

stiks02 [169]

Answer:

The number of pipes to be cut from total length of pipe is 10 pipes

Step-by-step explanation:

Given as :

Total length of pipe = l = 7 $\frac{1}{2}$ foot

i.e ' = $\frac{15}{2}$ foot

The length of pipe to be cut = l' = $\dfrac{3}{4}$ foot

Let The number of pipes to be cut = n pipes

<u>According to question</u>

The number of pipes to be cut = $\dfrac{\textrm Total length of pipe}{Length of pipe to be cut}$

i.e n = $\dfrac{l}{l'}$

Or, n = $\frac{\frac{15}{2}}{\frac{3}{4}}$

Or, n = $\frac{15\times 4}{3\times 2}$

or, n = 5 × 2

∴ n = 10 pipes

So, The number of pipes to be cut = n = 10 pipes

Hence, The number of pipes to be cut from total length of pipe is 10 pipes Answer

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3 years ago