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Ivanshal [37]
4 years ago
12

Ericka and her friend are going to reshelf library books. Sherri will reshelf 50% and Ericka will reshelf 2/5 of the books. If t

here are 80 books to reshelf, how many will be left?
Mathematics
1 answer:
ipn [44]4 years ago
5 0
Ok so we start with 80 books and remove 50% so 40
2/5 of 40 is 16
16 books
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Jordon missed 49 on his multiple choice math final and earned a grade of 65%. How many total questions were on the final exam?
harkovskaia [24]

Answer:

The exam was out of 75.

Step-by-step explanation:

You know that he earned 65% so more than half his answers were correct.

Then, you would guess and check try 49/60, 49/70, and go up by 10s or 5s. You will then realize that 49÷75 equals 65.333. This rounds up to 65.

8 0
3 years ago
Write 5/10 in three equivalent forms
krek1111 [17]

equivalent fractions are fractions which have the same value.

equivalent fractions all have the same simplified form

we can write equivalent fractions by multiplying both numerator and denominator by the same number. We can also write equivalent fractions by dividing both numerator and denominator by the same number

so 5/10

we can get the equivalent fractions by multiplying by a common number

when we multiply by 2

\frac{5}{10}* 2= \frac{5*2}{10*2} = \frac{10}{20}

when we multiply by 3

\frac{5}{10}* 3 = \frac{5*3}{10*3} = \frac{15}{30}

when we multiply by 4

\frac{5}{10} *4 = \frac{5*4}{10*4}  = \frac{20}{40}

the three equivalent fractions are

10/20 , 15/30, 20/40

5 0
4 years ago
Read 2 more answers
Which algebraic expression is equivalent to the expression below?
Anarel [89]

Answer:

A. 4x²+20x+25

Step-by-step explanation:

Because of PEMDAS, you calculate the value inside of the parenthesis first, so you expand [2x+1-(4x+6)]:

2x+1-4x-6 = -2x-5.

Then apply the exponent:

(-2x-5)² = (-2x-5)(-2x-5) = 4x²+10x+10x+25 = 4x²+20x+25

4 0
3 years ago
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Choose the correct answer from the given four options:In an AP if a = –7.2, d = 3.6, an = 7.2, then n
Serggg [28]

Answer:

n=5

Step-by-step explanation:

by using

n=(an-a)/a+1

substituting values

n= 7.2-(-7.2)/3.6 +1

n=5

5 0
3 years ago
The radius of a circle is 6mm. What is the area of the shaded portion of the circle.
mariarad [96]

Answer:

b) 29π mm²

Step-by-step explanation:

\frac{360}{360}  - \frac{70}{360}  =  \frac{290}{360}  \\  \\\pi \:  {r}^{2} \\  =    \frac{290}{360}  \times \pi\times 6 \times 6 \\  =  29 \: \pi  \: {mm}^{2}

6 0
3 years ago
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