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TiliK225 [7]
3 years ago
10

How do you do factor x²-49?

Mathematics
1 answer:
Allisa [31]3 years ago
3 0

Answer:

(x-7)*(x+7)

Step-by-step explanation:

49 can be factored as 7*7 = 7^2

x^2 - 49

= x^2 - 7^2

You also learned that a^2 - b^2 = (a-b) * (a+b), so in this case:

x^2 - 7^2  = (x-7) * (x+7)

So x^2 - 49 factored to become (x-7)*(x+7)

Hope this help you :3

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The width of a rectangle is 3 units less than the length. The area of the rectangle is 28 units. What is the width, in units, of
KATRIN_1 [288]

Answer:

4

Step-by-step explanation:

Let's call the width W and the length L.

We know the width is 3 less than the length, so:

W = L - 3

And we know the area is 28, so:

28 = WL

If we solve for L in the first equation:

L = W + 3

And substitute into the second equation:

28 = W (W + 3)

28 = W² + 3W

0 = W² + 3W - 28

0 = (W + 7) (W - 4)

W = -7, 4

Since W can't be negative, W = 4 units.

8 0
3 years ago
Help me with this problem
svlad2 [7]

Answer:

Angle A is F Angle A = 57. 52+71=123. 180-123=57

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3 years ago
The length of the hypotenuse of a right triangle is 13 m. the length of one leg is 5 cm. find the length of the other leg
eimsori [14]
A^2 + B^2=C^2 so there for the hypotenuse (13^2) - (5^2) will give you the last side
7 0
3 years ago
Divide 56 in the ratio 5 3
bogdanovich [222]
I don't understand what you need.

But,

5 + 3 = 8

56/8 = 7

7*5 = 35
7*3 = 21

Hope this helps !

Photon
6 0
3 years ago
Read 2 more answers
Help me please thank you.
jenyasd209 [6]
The correct answer is A: 2.

The slope compares the vertical change (the rise) to the horizontal change (the run) when moving from one fixed point to another along the line.

If you look at your graph, it takes 2 units up and 1 unit to the right in order to get to the next point on the line.

Therefore, the slope of the line is 2/1, or simply 2. It has a positive value because the line is sloping upward.
4 0
2 years ago
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