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Ne4ueva [31]
3 years ago
10

Can u help me solve 8-3(7-4y) i know the answer i just need to kown how i got the answer

Mathematics
1 answer:
VARVARA [1.3K]3 years ago
4 0
8 - 3(7-4y)
8 - (3x7 - 3x4y) You need to develop between parentheses bcs there is a minus between 8 and 3.
8 - (21 - 12y)
8 - 21 + 12y /!\ A minus before parentheses changes the sign in the parentheses !
12y - 13
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I'm confused on simplifying radicals.​
lakkis [162]

Answer: 4 or \sqrt{4 * 4}

To find the square root of a number, remember that there will be two factors that are the same that will give you the product.

Lets start from 1:

1 x 1 = 1

2 x 2 = 4

3 x 3 = 9

4 x 4 = 16

As you can see, 4 x 4 is 16. To make sure I'm correct, remember that a square roots consists two identical factors.

4 and 4 are the same numbers.

Therefore, \sqrt{16} = 4

It can also be written as \sqrt{4 * 4}

4 0
3 years ago
Read 2 more answers
Determine the intercepts of the line. yy y y -intercept: (\Big( ( left parenthesis ,, , comma )\Big) ) right parenthesis xx x x
BlackZzzverrR [31]

Question:

Give all the x and y intercept of the function

f(x) = \frac{3x^2 - 3x-60}{2x^3 + 2x^2-34x+30}

Answer:

The x intercepts are x = 5 and x = -4

The y intercept is at y = -2

Step-by-step explanation:

Factorizing the numerator of the expression we find the x intercepts as follows;

f(x) = \frac{3x^2 - 3x-60}{2x^3 + 2x^2-34x+30} =\frac{3(x-5)(x+4)}{2x^3 + 2x^2-34x+30}

Therefore, the x intercept are

x = 5 and x = -4

To find the y intercept, we put x = 0 to get y = -2

Therefore, the y intercept is at y = -2

Factorizing the denominator we find the values for which the equation is undefined

2·x³ + 2·x² - 34·x + 30 = 2·(x-1)·(x-3)·(x+5) which gives

x = 1, 3 and -5.

4 0
3 years ago
The combined yearly interest for x dollars invested at 13% and 20,000-x dollars invested at 8% is
Marina CMI [18]

Answer:

  total = 1600 +0.05x

Step-by-step explanation:

I = Prt

You want the sum of the interest from the two investments. The interest at 13% is ...

  I = Prt = x(0.13)(1) = 0.13x

The interest at 8% is ...

  I = Prt = (20000-x)(0.08) = 1600 -0.08x

Then the total interest earned is ...

  total = 0.13x + (1600 -0.08x)

  total = 1600 +0.05x

5 0
4 years ago
Solve for all possible values of x : |x-3|+4=1
Advocard [28]

Answer:

D: no real solutions

Step-by-step explanation:

7 0
3 years ago
Solve 7x + 1&lt; 4(x - 2).<br> {XIX&lt;3)<br> XIX&gt; 3<br> XIX-3]<br> {XIX&lt;-3)
tankabanditka [31]

Answer:

x <  - 3

Step by step explanation

3 0
3 years ago
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