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Natalija [7]
3 years ago
15

What is the unknown denominator if 9/12 = 3/

Mathematics
2 answers:
LiRa [457]3 years ago
7 0
Solve as a proportion:

\frac{9}{12}=  \frac{3}{x}

x = ?

Cross multiply:-

3 × 12 = 36

Divide:-

36 ÷ 9 = x
36 ÷ 9 = 4
x = 4

9/12 = 3/4

The unknown denominator is 4. <span />
adelina 88 [10]3 years ago
7 0
Do cross multiplication.

9              3
__   =        __
12            x

12×3=36. So now you found that out you will do a equation. Solve it.

9x=36
÷9   ÷9
________
x= 4

Now you got what the unknown denominator is. It's x=4. So 4.
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Suppose the average of 15 consectutive numbers is 15. What is the average of the first five numbers of the set?
Marina86 [1]
15x15= 225

15x + 105= 225

15x= 225-105

15x= 120

X=8

X+ (x+1) + (x+2) + (x+3)…etc all the way up too +(x+14)=225

The first five numbers of the set: 8, 9, 10, 11, 12
7 0
2 years ago
Factor 5x2 + 10x + 2x + 4
Genrish500 [490]

Answer:

(5 x + 2) (x + 2)

Step-by-step explanation:

Factor the following:

5 x^2 + 10 x + 2 x + 4

10 x + 2 x = 12 x:

5 x^2 + 12 x + 4

Factor the quadratic 5 x^2 + 12 x + 4. The coefficient of x^2 is 5 and the constant term is 4. The product of 5 and 4 is 20. The factors of 20 which sum to 12 are 2 and 10. So 5 x^2 + 12 x + 4 = 5 x^2 + 10 x + 2 x + 4 = 2 (5 x + 2) + x (5 x + 2):

2 (5 x + 2) + x (5 x + 2)

Factor 5 x + 2 from 2 (5 x + 2) + x (5 x + 2):

Answer: (5 x + 2) (x + 2)

5 0
3 years ago
Which situation below has a negative correlation?
katen-ka-za [31]

Answer:

In terms of negative correlation, I would say it's the longer you exercise, the more you sweat.

5 0
3 years ago
Read 2 more answers
Given f(x)=2x-1<br> find the domain value if the range value is 4.
larisa86 [58]

Answer:

  5/2

Step-by-step explanation:

You want to find x when f(x) = 4

  4 = 2x -1

  5 = 2x . . . . . add 1

  5/2 = x . . . . . divide by 2

The input corresponding to an output of 4 is 5/2.

5 0
3 years ago
1. It took Jed of an hour to complete his math homework on Friday. of an hour
Kobotan [32]

<em>Correct Question:</em>

<em>It took Jed 5/3 of an hour to complete his math homework on Friday, 3/4 of an hour on Saturday, and 5/6 of an hour on Sunday. How many hours did he take to complete his homework altogether?​</em>

Answer:

Total = 3\frac{1}{4}\ hours

Step-by-step explanation:

Given

Friday= \frac{5}{3}

Saturday = \frac{3}{4}

Sunday = \frac{5}{6}

Required

Determine the total time spent

Total time is calculated as follows:

Total = Friday + Saturday + Sunday

Total = \frac{5}{3} + \frac{3}{4} + \frac{5}{6}

Total = \frac{20 + 9 + 10}{12}

Total = \frac{39}{12}

Divide numerator and denominator by 3

Total = \frac{13}{4}

Total = 3\frac{1}{4}\ hours

6 0
3 years ago
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