A small school has 42 boys. If the ratio of boys to girls is 7 : 1, how many, students are?

48

Step-by-step explanation:

Total ratio  = 7 + 1 = 8

Let the total number of students be x

Number of boys.

7/8 × x = 42

7/8 x = 42

Multiply both sides by 8

8 × 7/8 x = 42× 8

7x = 336

Divide both sides by 7

7x / 7 = 336/7

x = 336/7 = 48

Therefore total number of students is 48

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d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

step-by-step explanation:

which of the following statements correctly describes the expression below based on its degree and number of terms?

314 - 7x2 + 11