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3 years ago

I need you to do all plssss

Mathematics

1 answer:

Ber [7]3 years ago

4 0

Answer:

9 = probably D(maybe A)

I'm not sure what the answer is for #9 but I think it is most likely D. A is multiply 6 by 4 which would be substituting the value of w, for w. D is adding 2 to 40 which is combining like terms.

10 = C, 65

40+p

40+25

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Extended Problems, Extraneous Solutions

diamong [38]

Answer:

1a. 2 is the solution

1b. -3 is because square root of 1 doesn't equal -1.

1c.-3

Step-by-step explanation:

$(x + 2 = \sqrt{3x + 10}$

Square both sides

$(x + 2) {}^{2} = 3x + 10$

Remeber perfect square Rule

$(x + y) {}^{2} = {x}^{2} + 2xy + {y}^{2}$

So now we got

$x {}^{2} + 4x + 4 = 3x + 10$

${x}^{2} + x + 4 = 10$

${x}^{2} + x - 6 = 0$

Factor into binomial.

$(x + 3)(x - 2) = 0$

So our solution is 3 or 2. However, let's check our work.

$- 3 + 2 = \sqrt{3( - 3) + 10}$

$- 1 = \sqrt{1}$

However square root of 1 is 1. It could be 1 but in Math, We only take the principal square root which is positive always. So -3 isn't a solution.

So let try 2.

 $2 + 2 = \sqrt{3(2) + 10} = 4 = \sqrt{16} = 4 = 4$ 

So this is indeed the solution.

Make up equation for 2 and 3. Ask me if you need help.

5 0

2 years ago

The perimeter of a standard basketball court is 288 ft. Find the dimensions of the basket ball court if its length is 44 longer

Vinil7 [7]

Answer:

w = 50, l = 94

Step-by-step explanation:

l = w + 44, to find perimeter we need 2l + 2w = 288 and we know l so substitute 2(w+44) + 2w = 288, so 2w + 88 + 2w = 288 so 4w = 200, therefore w = 50

8 0

3 years ago

Simplify 3 to the negative power of 9 over 3 to the negative power of 12

Dmitriy789 [7]

Answer:

Step-by-step explanation:

3^-9/ 3^-12

Simply change the division into multiplication. The denominator will become numerator. We are doing so because the base are same.

3^-9 * 3^12

Negative sign of power 12 become positive

Add the powers because the base is same.

3^-9+12

3^3

3^3 means multiply 3 three times

3*3*3

=27....

8 0

4 years ago

Read 2 more answers

Factor completely x2 + 8x - 20

kvv77 [185]

X-2
Hope this helps!
Vote me brainliest!

3 0

3 years ago

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I have a trapezoid what is the answer for a 4 inches in height by8 inches in base

andrey2020 [161]

We need to find the other base also in order for us to find out what the area of this is.

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3 years ago