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Agata [3.3K]
4 years ago
10

NEED HELP ASAP. By what percent will a fraction change if its numerator is decreased by 30% and its denominator is decreased by

20%?
Mathematics
1 answer:
joja [24]4 years ago
5 0

Answer:

0.7x/0.8y = x/y * 0.7/0.8 = x/y * 0.875

So the fraction is reduced by 12.5%

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Yesterday, Ryan had 150 baseball cards. Today, he got d more. Using d , write an expression for the total number of baseball car
natali 33 [55]

Hey there!

Here is an expression for the number of cards Ryan may have.

150 + d = ?

Hope this helps!

4 0
3 years ago
Right answer gets brainlist
mr Goodwill [35]

Answer:

2309

Step-by-step explanation:

V = pi times radius^2 times height

7 0
3 years ago
Read 2 more answers
In the triangle below, find the measurements of the unknown angles.
LUCKY_DIMON [66]

Answer:

E. 35°, 70°

Step-by-step explanation:

Sum of angles add up to 180° in every triangle.

Step 1: Set up equation

a + 2a + 75 = 180

Step 2: Combine like terms

3a + 75 = 180

Step 3: Subtract 75 on both sides

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Step 4: Divide both sides by 3

a = 35

So 1 angle is 35°

Step 5: Plug in <em>a</em> to find last angle

2(35) = 70°

7 0
3 years ago
a recent study by a researcher found that 82% of teenagers have used cellphones while driving a vehicle.suppose a random sample
melomori [17]

The probability that the sample proportion is less than 0.80 is mathematically given as P(z<-0.52)

<h3>What is the probability that the sample proportion is less than 0.80?</h3>

Generally, the equation for probability is  mathematically given as

p=82/100

Therefore

p=0.82

q=1-p

q=1-0.82

q=0.18

SE=\sqrt{\frac{p(1-p)}{n}}\\\\SE=\sqrt{\frac{0.8(1-0.8)}{100}}\\\\SE=0.03841

b)

P(p < 0.80)=p(\frac{p-0.82}{0.0384} < \frac{0.8-0.82}{0.0384})\\\\P(z < -0.52)

Read more about probability

brainly.com/question/11234923

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4 0
3 years ago
Maria has a spinner that has 10 equal sections each containing a different number from 1 to 10 Maria determines about how many t
SSSSS [86.1K]

Answer:

There are 3 numbers greater than 7 on this spinner:  8, 9 and 10.  Mariah wrote 4 instead of 3, which makes her probability higher.  

She should have:

3/10(250) = 750/10 = 75

6 0
3 years ago
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