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2 years ago

Find a number if: 3/7 of it is 2 1/4

Mathematics

2 answers:

Sergeeva-Olga [200]2 years ago

8 0

Answer:

x=5 1/4

Step-by-step explanation:

2 1/4= $\frac{9}{4}$ ---> $\frac{9}{4}$ divided by 3 to find 1/7x----> $\frac{3}{4}$ =1/7x---> x=21/4---> x=5 1/4

Inessa [10]2 years ago

6 0

Answer:

The number is 5¹/₄

Step-by-step explanation:

3/7 of it is 2 ¹/₄

let the it be represented as A

3/ 7 of A = 2 ¹/₄

3A/7 = 4X2+1/4 = 9/4

3A/7= 9/4

cross multiply

3A X4 = 9x7

12A = 63

A = 63/12 = 21/4= 5¹/₄

The number is 5¹/₄

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Step-by-step explanation:

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From the problem we know that $T(2,4)=(3,2)$ , so we need to find the values $v_1$ and $v_2$ such that $T(2,4) = (2 + v_1,4+v_2)=(3,2)$ , so $3=2 + v_1$ and $4+v_2=2$ , thus $v_1=1$ and $v_2=2$ .