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Elenna [48]
2 years ago
14

Equivalent fractions

Mathematics
1 answer:
lyudmila [28]2 years ago
3 0

Answer:

number 1. 5/4  number 2.  7/4 number 3. 1/5

Step-by-step explanation                                                                                           It's the shaped parts. Hope this helps : )

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What is the volume of the cone below?​
nataly862011 [7]

Answer:

96 pi

Step-by-step explanation:

The formula for the volume of a cone is V=pi*r^2*h/3 the radius is 4 and the height is 18 plug in those values into the equation to get V=pi*16*6 16*=96 so the answer is 96 pi.

3 0
3 years ago
Read 2 more answers
Unoccupied seats on flights cause airlines to lose revenue. Suppose a large airline wants to estimate its average number of unoc
Len [333]

Answer: 3

Step-by-step explanation:

Given : Standard deviation : \sigma=4.1\text{ seats}

Margin of error : E=\pm5\text{ seats}

Significance level : \alpha: 1-0.95=0.05

By using the standard normal table of z ,

Critical value : z_{\alpha/2}=1.96

The formula we use to find the minimum sample size required :-

n=(\dfrac{z_{\alpha/2}\ \sigma}{E})^2

i.e. n=(\dfrac{(1.96)(4.1)}{5})^2=2.58309184\approx3

Hence, the number of lights should we select if we wish to estimate μ to within 5 seats and be 95 percent confident =3

6 0
3 years ago
12 grapes cost 90 $how many can bought in 40$
likoan [24]

Let x = the amount of grapes that can be bought for 0.40.


Note: By 90 I assume you mean 90 cents. The same for 40.


12/x = 0.90/0.40


0.90x = 12(0.40)


0.90x = 4.80


x = 4.80 ÷ 0.90


x = 5.33333


We can round the decimal to the ones place to get 5 grapes.




4 0
3 years ago
Read 2 more answers
JB's music store is offering a 20% discount on all CDs and DVDs, meaning 80% of the price remains. If the discounted price of a
podryga [215]

Answer:

$21 is the answer

Step-by-step explanation:

Okay so all I did was find what number times 0.8=$16.80 which is $21.

6 0
3 years ago
Choose the product.<br><br> (3x^2 + 2x - 3)(x - 1)
PIT_PIT [208]
<span><span>Step by step is like....:

(<span><span><span>3<span>x2</span></span>+<span>2x</span></span>−3</span>)</span><span>(<span>x−1</span>)</span></span><span>
=<span><span>(<span><span><span>3<span>x2</span></span>+<span>2x</span></span>+<span>−3</span></span>)</span><span>(<span>x+<span>−1</span></span>)</span></span></span><span>
=<span><span><span><span><span><span><span>(<span>3<span>x2</span></span>)</span><span>(x)</span></span>+<span><span>(<span>3<span>x2</span></span>)</span><span>(<span>−1</span>)</span></span></span>+<span><span>(<span>2x</span>)</span><span>(x)</span></span></span>+<span><span>(<span>2x</span>)</span><span>(<span>−1</span>)</span></span></span>+<span><span>(<span>−3</span>)</span><span>(x)</span></span></span>+<span><span>(<span>−3</span>)</span><span>(<span>−1</span>)</span></span></span></span><span>
=<span><span><span><span><span><span>3<span>x3</span></span>−<span>3<span>x2</span></span></span>+<span>2<span>x2</span></span></span>−<span>2x</span></span>−<span>3x</span></span>+3</span></span><span>
=<span><span><span><span>3<span>x3</span></span>−<span>x2</span></span>−<span>5x</span></span>+<span>3

Hoped I helped!</span></span></span>
4 0
4 years ago
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