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nlexa [21]
3 years ago
11

Multiply (j+7)•(j-7)

Mathematics
1 answer:
Svetach [21]3 years ago
5 0
(j+7) * (j-7) =  j^{2} -  7^{2} =  j^{2}  - 49
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If n ll m, find the value of x and the value of z.
aliina [53]
Answer: A

Explanation: the two triangles are proportional, so find the “proportion” between the two sides
12/4=3
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7 0
3 years ago
What number needs to be added to 5 and 3 so that the ratio of the first number to the second
Mashcka [7]

Answer:

3

Step-by-step explanation:

Choose a variable to represent the number to be added to 5 and 3.

\frac{5+x}{3+x}=\frac{4}{3}

"Cross-multiply."

3(5+x)=4(3+x)\\\\15+3x=12+4x\\\\15=12+x\\\\3=x

Check:  The ratio of 5+3 to 3 + 3 is 8:6, equal to the ratio 4:3.

5 0
3 years ago
What is the value of M ?
Murrr4er [49]

Answer:

m = 124 degrees.

Step-by-step explanation:

The sum of the interior angles of a triangle is 180.

The angle opposite m + 56 + 68 = 180.

The angle opposite m = 56.

The angle opposite m + m = 180, so 56 + m = 180.

Angle m = 124.

6 0
3 years ago
Express 20minutes as ratio of 2hours​
Flauer [41]

Answer:

1hr : 10min

Step-by-step explanation:

2 hrs = 120 min

1 hr : 60 min

so

1hr : 10min

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