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4 years ago

Please. I really need help in Algebra I. THE PICTURE GOES TO THE THIRD PROBLEM.

Mathematics

2 answers:

strojnjashka [21]4 years ago

4 0

Answer:

1) 2x^2 -8x

2) 18x^2 -45x

Step-by-step explanation:

These problems make use of the distributive property. It tells you how you can use or eliminate parentheses as you may need.

a(b + c) = ab + ac . . . . . . . the outside factor multiplies each inside term

Of course, the usual rules of multiplication of positive and negative numbers apply. If the number of minus signs in a product is odd, the result is negative; otherwise the result is positive.

1. 2x(x -4) = (2x)(x) + (2x)(-4) = 2x^2 -8x

2. -9x(5 -2x) = (-9x)(5) + (-9x)(-2x) = -45x +18x^2 = 18x^2 -45x

3. She used the algebra tiles correctly.

The headers correctly represent -2x-2 and 2x-1
Each product has the correct sign (-- = +, -+ or +- = -)
Each product has the correct power of x

aleksandrvk [35]4 years ago

3 0

Answer:

She used the algebra tiles correctly.

Step-by-step explanation:

This is the answer on edgenuty

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Verizon [17]

If f(x) has an inverse on [a, b], then integrating by parts (take u = f(x) and dv = dx), we can show

$\displaystyle \int_a^b f(x) \, dx = b f(b) - a f(a) - \int_{f(a)}^{f(b)} f^{-1}(x) \, dx$

Let $f(x) = \sqrt{1 + x^3}$ . Compute the inverse:

$f\left(f^{-1}(x)\right) = \sqrt{1 + f^{-1}(x)^3} = x \implies f^{-1}(x) = \sqrt[3]{x^2-1}$

and we immediately notice that $f^{-1}(x+1)=\sqrt[3]{x^2+2x}$ .

So, we can write the given integral as

$\displaystyle \int_0^2 f^{-1}(x+1) + f(x) \, dx$

Splitting up terms and replacing $x \to x-1$ in the first integral, we get

$\displaystyle \int_1^3 f^{-1}(x) \, dx + \int_0^2 f(x) \, dx = 2 f(2) - 0 f(0) = 2\times3+0\times1=\boxed{6}$

7 0

2 years ago

What is the answer to 76?

vovangra [49]

Answer:

13.2 minutes or 13 minutes 12 seconds.

Step-by-step explanation:

1. Count how much water drains the first pump every minute. Let the volume of pool be D. Every minute first pump drains D/11 water.

2. Working together(6 minutes) First pump drains 6D/11 water, hence the second pump drains 5D/11 water.

3.Count how much water drains second pump per minute -> (5D/11)/6= 5D/66

4. It takes the second pump 66 minutes to drain pool 5 times, thus it takes 13.2(66/5) minutes to drain the pool, which is 13 minutes 12 seconds.

7 0

4 years ago

What is the simplified form for the following expression <br><br> -(3y-9z)

Sonja [21]

The answer is: -3y+9z

This is because you simply switch the sign for every number in the parentheses.

Hope this helps!

5 0

3 years ago

Slope of -5 2). (3,9)

podryga [215]

Answer:

The slope of the given two points is $m=\frac{7}{8}$

Step-by-step explanation:

Given two points are (-5,2) and (3,9)

To find the slope with these two points

Let $(x_{1},y_{1})$ and $(x_{2},y_{2})$ be the given points

By using Slope Formula:

$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

$m=\frac{9-2}{3-(-5)}$

$m=\frac{9-2}{3+5}$ ( subtracting and adding the corresponding terms)

$m=\frac{7}{8}$

Therefore slope is $m=\frac{7}{8}$

The slope of the given two points is $m=\frac{7}{8}$

3 0

3 years ago

Q.8 What is the tail length?

Arlecino [84]

If I'm correct you should make a fraction first
5.4 3.6
----- to -----
4.8 ?

Now find the missing number
5.4 to 3.6 would be a difference of ÷ 1.5 so you must do the same for 4.8

÷<span>1.5 </span>
5.4 3.6
----- to -----
4.8 3.2
÷1.5

The tail length should be 3.2 feet

3 0

4 years ago