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Sedaia [141]
3 years ago
8

9. Stephanie gets her hair cut every 42 days. Her sister goes to the

Mathematics
1 answer:
Fiesta28 [93]3 years ago
5 0

Answer:

Yes

408 days

Step-by-step explanation:

The LCM is 408

= 408 days

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How to solve to system y=x^2-2 y=2x+1
vovikov84 [41]

Answer:

the solutions are (3, 7) and (-1, -1)

Step-by-step explanation:

Insert the " = " symbol between the two equations, obtaining:

y = x^2 - 2 = y = 2x + 1

Then x^2 - 2 = 2x + 1, or

x^2 - 2x - 3 = 0, and this can be factored into (x - 3)(x + 1) = 0.

Thus, the x values that satisfy this system are {-1, 3}.

Use y = 2x + 1 to find the corresponding y values:

y = 2(-1) + 1 = -1

and

y = 2(3) + 1 = 7

Then the solutions are (3, 7) and (-1, -1)

7 0
4 years ago
What is the exact area of a circle with a radius of 12 ft
lisov135 [29]

Answer:

The area is approximately 453 ft²

Step-by-step explanation:

Area of a circle = \pi r^{2}

If \pi = 22/7, and  r = 12 ft

Area = (22/7)×12²

= 3.143*144

= 452.592 ft²

≈ 453 ft²

5 0
3 years ago
Given: 5x + 3 &gt; 4x + 7.<br> Choose the graph of the solution set.
Mkey [24]

Answer:

The first one

Step-by-step explanation:

We simplify this inequality to x>4. This means it is moving past the four to the right with an open dot

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D.
30x2=60
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