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3 years ago

What is the area ?!!

Mathematics

2 answers:

Tresset [83]3 years ago

6 0

Answer:

309.02

Step-by-step explanation:

A=2(1+2)a2=2·(1+2)·82≈309.01934

lianna [129]3 years ago

5 0

Answer:A≈173.82ft²

Step-by-step explanation:

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Neko [114]

Answer:

Step-by-step explanation:

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3 years ago

James bought Nicole a pair of shoes for $54.99 and a bracelet for $21.99. He used a 15% off coupon and then paid 7.5% sales tax.

mina [271]

Answer:

$70.34

Step-by-step explanation:

The total before the coupon and tax is:

$54.99 + $21.99 = $76.98

Now apply the 15% coupon:

Since the total price is 100% of the price, when you apply a 15% coupon, you pay 100% - 15% = 85% of the price. We need to find 85% of $76.98

85% * $76.98 =

= 0.85 * $76.98

= $65.43

The price after the 15% coupon, but before the tax, is $65.43

Now the total $65.43 is considered 100% of the price. The tax is 7.5%.

100% + 7.5% = 107.5%

Now we find 107.5% of $65.43

107.5% of $65.43 =

= 1.075 * $65.43

= $70.34

Answer: $70.34

6 0

3 years ago

Read 2 more answers

Let R be the region enclosed by the y-axis, the line y=1 and the curve y=x^3. A solid is generated by rotating R about the line

scZoUnD [109]

Answer:

The volume of the solid is 19. $\overline{142857}$ unit³

Step-by-step explanation:

The given function is y = x³

The solid is created by revolving R about the line y = 1

We have that when y = 1, x = 1

Taking the end point as x = 2, we have the volume given by the washer method as follows;

$V = \pi \cdot \int\limits^a_b {\left( [f(x)]^2 - [g(x)]^2 \right)} \, dx$

Where;

a = 1, and b = 2, we have;

g(x) = 1

$V = \pi \cdot \int\limits^{2}_1 {\left( [x^3]^2 - [1]^2 \right)} \, dx = \pi \cdot \left[\dfrac{x^7}{7} + x \right]_1^{2} = \pi \cdot \left[\dfrac{2^7}{7} +2 -\left( \dfrac{1^7}{7} + 1\right)\right] =19\dfrac{1}{7}$

The volume of the solid, V = $19\dfrac{1}{7}$ unit³ = 19. $\overline{142857}$ unit³

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4 years ago

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Dahasolnce [82]

41. A. 30
42. 148 because supplementary angles equal 180

3 0

3 years ago

Monica is attempting to factor the expression 18x2 + 27x – 5. In her first step, she rewrites the expression as 18x2 + 32x – 5x

lisabon 2012 [21]

Answer:

Step-by-step explanation:

For quadratic expression in this form, the first step is to multiply the number in front of $x^2$ with the last term, the constant (with the sign in front as well). This is the "multiplied number".

Step 2 is to come up with 2 numbers which when multiplied is equal to the "multiplied number" in step 1 above and also add to the number in front of $x$ .

For this problem, we would need 2 numbers that

Add up to 27, and
When multiplied, comes to -90 (18 * -5 = -90)

They already found the 2 numbers as expressed in the form shown $18x^2+32x-5x-5$ . The 2 numbers are +32 and -5.

Do they add up to 27, as required?

Yes, 32-5=27

Do they come to -90 when multiplied?

No, 32 * -5 = -160

Hence, they add up, BUT NOT multiplied.

So the answer choice B is right.

5 0

3 years ago