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dedylja [7]
3 years ago
12

A bulletin board is 23 square feet. What is the approximate perimeter of the bulletin board? And wants to have an area of 32 squ

are feet. About how many feet of fencing would he need? A window is a square and has an area of 15 square feet. About how many feet of wood is needed to frame the window? A frame is 2 inches thick. The area of the picture and frame together is 121 inches. What is the length if the picture? What is the are of the picture? 10 POINTS FOR EACH ANSWER!!
Mathematics
2 answers:
miskamm [114]3 years ago
5 0

Answer: The answer to the first question is 20

Step-by-step explanation:

Dafna11 [192]3 years ago
5 0

Answer: The answer to the first question is 20

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A board game that normally costs $30 is on sale for 25 percent off. What is the sale price of the game?
Roman55 [17]
25% off translates into 0.25($30) = $7.50 off.

A faster way to determine the sales price is to subtract 0.25 from 1.00 and then mult. the regular price by the result:  sales price = 0.75($30) = $22.50 (answer)

5 0
2 years ago
I'm genuinely lost in any problems like this and my teachers are no help, I need help doing exponents in general, everything to
Stolb23 [73]

Answer:

See below.

Step-by-step explanation:

4)

So we have the expression:

(-6n^{-3})^2

We can use the power of a product property, where:

(ab)^n=a^n\cdot b^n

So:

=(-6)^2\cdot(n^{-3})^2

For the left, -6 squared is the same as -6 times -6. This equals positive 36.

For the right, we can use the power of a power property. The property says that:

(a^n)^k=a^{nk}

So:

(n^{-3})^2=n^{(-3)(2)}\\=n^{-6}

So, all together, we have:

=(-6)^2\cdot(n^{-3})^2\\=36n^{-6}

6)

We have the expression:

-\frac{3x^0}{x^4}

First, note that anything to the zeroth power (except for 0) is 1, thus, x^0 is also 1. Simplify:

=-\frac{3}{x^4}

And that's the simplest we can do :)

Notes for 6)

We <em>can</em> put the x^4 to the numerator. Recall that when you put an exponent to opposite side, you put a negative. In other words:

x^n=\frac{1}{x^{-n}}

And vice versa:

\frac{1}{x^{-n}}=x^n

So, we can write the above as:

=-\frac{3}{x^4}\\=-\frac{3}{x^{-(-4)}}\\=-3x^{-4}

However, traditionally, we want only positive exponents, so this wouldn't be correct.

4 0
3 years ago
Read 2 more answers
I need help remembering the steps to solve a polynomial equation
murzikaleks [220]
Example 1 – Solve: 3x3 = 12x

Step 1: Write the equation in the correct form. In this case, we need to set the equation equal to zero with the terms written in descending order.

 3x^3-12=0

Step 2: Use a factoring strategies to factor the problem.

 3x(x^2-4)=0
3x(x+2)(x-2)=0

Step 3: Use the Zero Product Property and set each factor containing a variable equal to zero.

 3x=0 or x+2=0 or x-2=0

Step 4: Solve each factor that was set equal to zero by getting the x on one side and the answer on the other side.

 x=0 or x=-2 or x=


I hope this helped you!


3 0
2 years ago
The _______ converts linear motion of the pistons into rotary motion.
agasfer [191]
Coonnecting Rod is the answer

5 0
3 years ago
The value of y varies directly with x. when y = 7.5, x = 5. what is the value of y when x = 80?.
Ksenya-84 [330]

Answer:

Step-by-step explanation:

120 = y. the ratio is 3:2

80/2 is 40

40 times 3 is 120

120:80 = 3:2

4 0
3 years ago
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