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2 years ago

To break the school’s record, the girls’ time had to be faster than

Mathematics

1 answer:

Finger [1]2 years ago

3 0

Answer:The answer is no they are slower by 20%

Step-by-step explanation:divide 12 by 5 then divid the answer of 12 by 5 by 2 then you get the answer of 20%

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Michelle wants ice cream and created a tree diagram to help her organize her options.

Serhud [2]

I think 33.3% that he Chooses that

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3 years ago

Read 2 more answers

Y = mx + b

Yuki888 [10]

The last option, the y-intercept.

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3 years ago

Marks's dad drove 123 miles in 2 hours. At that rate, how many miles would he drive in 5 hours?

mihalych1998 [28]

Answer:

307.5

Step-by-step explanation:

He drove 123 miles in 2 hours. If you go 100 miles in 2 hours that means you went 50 miles in one hour right? Using the same logic we can convert 123 miles in 2 hours to 61.5 miles per hour and then multiply it by 5.

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2 years ago

b) How many white-winged cross bills will there be at the end of June 2020? (Remember that t represent

Mandarinka [93]

Answer:

A dozen = 12

Step-by-step explanation:

I think I’m right

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3 years ago

20 people applied for a job. Everyone either has a school certificate or diploma or even both. If 14 have school certificates an

STatiana [176]

Given:

Either has a school certificate or diploma or even both = 20 people

Having school certificates = 14

Having diplomas = 11

To find:

The number of people who have a school certificate only.

Solution:

Let A be the set of people who have school certificates and B be the set of people who have diplomas.

According to the given information, we have

$n(A)=14$

$n(B)=11$

$n(A\cup B)=20$

We know that,

$n(A\cup B)=n(A)+n(B)-n(A\cap B)$

$20=14+11-n(A\cap B)$

$20=25-n(A\cap B)$

Subtract both sides by 25.

$20-25=-n(A\cap B)$

$-5=-n(A\cap B)$

$5=n(A\cap B)$

We need to find the number of people who have a school certificate only, i.e. $n(A\cap B')$ .

$n(A\cap B')=n(A)-n(A\cap B)$

$n(A\cap B')=14-5$

$n(A\cap B')=9$

Therefore, 9 people have a school certificate only.

3 0

3 years ago