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Nitella [24]
3 years ago
5

The sum of 4 times a number and 7 equals 9

Mathematics
2 answers:
mestny [16]3 years ago
7 0

Answer:n=1/2

Step-by-step explanation:

4n+7=9

   -7   -7

4n=2

divide by 4 on both sides

n=1/2

Reptile [31]3 years ago
4 0

Answer:

0.5

Step-by-step explanation:

0.5 x 4 = 2, 2 + 7 = 9

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Please help me by solving this!​
JulsSmile [24]

Answer:

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Biju age is 18

Step-by-step explanation:

let Ani age be X

let Biju age be Y

the difference of their age is 3

i.e X - Y = 3......,....(equ. 1)

let Dharam age be A

let Cathy age be B

i.e A = 2x

B = y/2

the difference of their age is 30

Y/2 - 2x = 30..... (equ. 2)

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from equ.3

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5 0
3 years ago
Given that the points (-1, 5) and (2, 1) are vertices of a rectangle with sides parallel to the axes, how much longer is the len
Norma-Jean [14]

Answer:

Correct choice is A

Step-by-step explanation:

Two vertices of the rectangle have coordinates A(-1, 5) and B(2, 1). If rectangle sides are parallel to the axes, then two remaining vertices have coordinates C(-1,1) and D(2,5) (see attached diagram for details).

Find the length and the width:

AC=\sqrt{(-1-(-1))^2+(5-1)^2}=4\ units,\\ \\AD=\sqrt{(2-(-1))^2+(5-5)^2}=3\ units.

Then the length is 1 unit longer than the width.

7 0
3 years ago
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