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Dmitry [639]
2 years ago
9

A school has 60% girls and 40% boys. If 30% of the girls wear glasses and 20% of the boys wear glasses, what percent of all stud

ents wear glasses?
A 36%
B 25%
C 42%
D 26%​
Mathematics
1 answer:
Zina [86]2 years ago
7 0

Answer:

25%

Step-by-step explanation:

there is total boys and total girls so 200%

30%girls take

20%boys it is 50% of 200 % so 25% of all

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ASHA 777 [7]

stranger things A jewellery shop is having a sale.

A bracelet is reduced to £240.

a) What is the original price?

A ring is reduced to £840.

This is 40% of the original price.

b) Work out the original price of this ring.A jewellery shop is having a sale.

A bracelet is reduced to £240.

a) What is the original price?

% of the original price.

b) Work out the original price of this ring.A jewellery shop is having a sale.

A bracelet is reduced to £240.

a) What is the original price?

A ring is reduced to £840.

This is 40% of the original price.

b) Work out the original price of this ring.A jewellery shop is having a sale.

A brace

A ring is reduced to £840.

This is 40% of the original price.

b) Work out the original price of this ring. yeey this is important

3 0
3 years ago
Read 2 more answers
Gilbert is graduating from college in one year, but he will need a loan in the amount of $5,125 for his last two semesters. He m
sleet_krkn [62]
First, determine the effective interests given both interest rates.

(1)   ieff = (1 + 0.068/12)^12 - 1 = 0.07016
(2)   ieff = (1 + 0.078/12)^12 - 1 = 0.08085

Calculating the interests will entail us to use the equation,
     I = P ((1 + i)^n - 1)

Substituting the known values,
  (1)    I = ($5125)((1 + 0.07016)^1/2 - 1)
          I = $176.737

   (2)    I = ($5125)(1 + 0.08085)^1/2 - 1)
            I = $203.15

a. Hence, the greater interest will be that of the second loan. 

b. The difference between the interests,
    d = $203.15 - $176.737
          $26.413
7 0
3 years ago
The question is on the picture
Vadim26 [7]

<em>Answer,</em>

100,000,000 > 334,605,925

But, 100,000,000 is smaller that 334,605,952

So, It would be "100,000,000 < 334,605,925"



7 0
3 years ago
A brochure claims that the average maximum height for a certain type of plant is 0.7 m. A gardener suspects that this is not acc
larisa [96]

Answer:

As Z, it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.

Step-by-step explanation:

1. Relevant data:

\mu=0.70\\N=40\\\alpha=0.05\\X=0.65\\s=0.20

2. Hypotesis testing

H_{0}=\mu=0.70

H_{1} =\mu< 0.70

3. Find the rejection area

From the one tail standard normal chart, whe have Z-value for \alpha=0.05 is 1.56

Then rejection area is left 1.56 in normal curve.

4. Find the test statistic:

Z=\frac{X-\mu_{0} }{\sigma/\sqrt{n}}

Z=\frac{0.65-0.70}{0.20/\sqrt{40}}\\Z=-1.58

5. Hypotesis Testing

Z_{\alpha}=1.56\\Z=-1.58

-1.58

As Z, it is possible to reject null hypotesis. It means that the local mean height is less tha 0.7 m with a 5% level of significance.

4 0
3 years ago
What is m pqr? <br> Please helps
LiRa [457]

Answer:

134 degrees

Step-by-step explanation:

Line PQS is 180 degrees. That being said, the addition of <PQR and <SQR equal 180 degrees.

Now you need to set up an equation to find out what angle PQR is. Since there is an X, you need to solve for X. The equation looks like this:

(3x+5) + (x+3) = 180

<u>Solve for x</u>

(3x+5) + (x+3) = 180\\4x+8=180\\4x=172\\x=43

Now plug in 43 where you see x. For this question, you only need to focus on (3x+5)

3(43) + 5 = 134

m<PQR = 134°

Do this every, single, time when you see these questions. Remember that line PQS is 180 degrees, and both of those angles are equal to 180 degrees.

If you want to check if this is true, plug in 43 into our equation we made to see if it equals 180 degrees. <em>If it doesn't equal 180, your equation is incorrect.</em>

<em />

3(43)+5+43+3 = 180

134 + 46 = 180

180 = 180 ✅

4 0
2 years ago
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