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4 years ago

How do you work this problem (21÷7)×4= is this correct? 3×4=12

Mathematics

2 answers:

Semenov [28]4 years ago

5 0

(21 ÷ 7) x 4 Divide 21 by 7
3 x 4 Multiply 3 by 4
12

valkas [14]4 years ago

3 0

Yes that's correct 21 divided 7 is three three times 4 is twelve

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Que es un término algebraico

Tems11 [23]

Answer: an algebraic term?

Step-by-step explanation:

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3 years ago

Two resorts advertise an average temperature of 75°F during the peak season. A travel agent researches the daily high temperatur

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ans C. the average temperature at the two resorts is about the same, but the range of temperature is different

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3 years ago

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Diane walked her dog 4/10 of a mile in 5 days this week. how far did diane walk her dog this week?

Charra [1.4K]

Answer:

.56 miles or 56/100 of a mile

Step-by-step explanation:

5 days = 4/10 = .4

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7 0

4 years ago

Suppose that 5 out of 13 people are to be chosen to go on a mission trip. In how many ways can these 5 be chosen if the order in

algol [13]

5 People can be chosen in 1287 ways if the order in which they are chosen is not important.

Step-by-step explanation:

Given:

Total number of students= 13

Number of Students to be selected= 5

To Find :

The number of ways in which the 5 people can be selected=?

Solution:

Let us use the permutation and combination to solve this problem

$nCr=\frac{(n)!}{(n-r)!(r)!}$

So here , n =13 and r=5 ,

So after putting the value of n and r , the equation will be

$13C_5=\frac{(13)!}{(13-5)!(5)!}$

$13C_5=\frac{(13 \times12 \times11 \times10 \times9 \times8\times7 \times6 \times5 \times4 \times3 \times2 \times1)}{(8 \times7 \times6 \times5 \times4 \times3 \times2 \times1)(5 \times4 \times3 \times2 \times1)}$

$13C_5=\frac{(13 \times12 \times11 \times10 \times9 )}{((5 \times4 \times3 \times2 \times1)}$

$13C_5=\frac{154440}{120}$

$13C_5= 1287$

8 0

4 years ago

Find PNO, please help asap

Scilla [17]

Answer:

Step-by-step explanation:

Since MNP is equilateral, so <PNM=60, and since OP//NM, and <PON is 90, so <MNO=90=<PNM+PNO,so 90=60+<PNO,so <PNO=30

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3 years ago