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3 years ago

90 out of 120 students in your grade are girls at your school. What percentage are boys?

Mathematics

1 answer:

sesenic [268]3 years ago

7 0

30% Bc there are 30 boys and 90 girls or it’s 10% boys

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How many solutions does 0.75(x+40)=0.35(x+20)+0.35(x+20) have?

Neporo4naja [7]

Only one because there is one variable and the combined coefficients of x are non-zero.
(0.75(x+40)=0.70(x+20), 0.05x=14-30=-16, x=-320)

4 0

3 years ago

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A bucket contains 40 red balls, 25 black balls, and 35 white balls. Two balls are drawn at random. What is the probability that

Lyrx [107]

Answer:

$Probability = \frac{1}{5}$ or $Probability = 0.2$

Step-by-step explanation:

Given

$Black = 25$

$White = 35$

$Red = 40$

Required

Determine the probability of selecting Black and Red

First, we need to calculate the number of red and black balls

The probability is calculated as thus:

$Probability = P(Black\ and \ Red) \ or\ P(Red\ and \ Black)$

Convert to mathematical expressions

$Probability = [P(Black) *P(Red)] + [P(Red) *P(Black)]$

Solve for each probaility;

$P(Black) = \frac{Black}{Total} = \frac{25}{100}$

$P(Red) = \frac{Red}{Total} = \frac{40}{100}$

So, we have:

$Probability = [P(Black) *P(Red)] + [P(Red) *P(Black)]$ $Probability = [\frac{25}{100} *\frac{40}{100}] + [\frac{40}{100} *\frac{25}{100}]$

$Probability = [\frac{1000}{10000}] + [\frac{1000}{10000}]$

$Probability = [\frac{1}{10}] + [\frac{1}{10}]$

$Probability = \frac{1+1}{10}$

$Probability = \frac{2}{10}$

$Probability = \frac{1}{5}$

$Probability = 0.2$

7 0

3 years ago

Solve for c.

Vanyuwa [196]

Answer:

Step-by-step explanation:

solve for c by simplifying both sides of the equation then isolate the variable

6 0

3 years ago

Which questions are statistical questions?

Yanka [14]

Answer:

Which questions are statistical questions?

what is the number of students what is the height of each in my class?

how many servings of fruit did eat each day this month?

what is my height?

what is the highest temprature

of each month this year?

how many students from each school in this city love football?

Step-by-step explanation:

Need to include numerical values

8 0

3 years ago

If i am 6 ft tall and he is 4 ft tall how tall are we together

Elenna [48]

Answer:10

Step-by-step explanation:

6+4=10

6 0

3 years ago

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