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4 years ago

I need Algebra Help Please

Mathematics

1 answer:

Elina [12.6K]4 years ago

3 0

Answer:

$x^2-2x+4-\dfrac{15}{x+2}$

Step-by-step explanation:

Synthetic division is a useful tool for problems of this sort. (see below)

Another way to work this one is to make use of the remainder theorem. The remainder from division by x+2 will be the value of the function at x=-2 (the value of x that makes the divisor be zero).

(-2)³ -7 = -8 -7 = -15

Only one answer choice shows a remainder of -15, and all agree on the quotient.

$x^2-2x+4-\dfrac{15}{x+2}$

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:( I Need help! Show work please! Aviva has a total of 52 coins, all of which are either dimes or nickels. The total value of th

Jet001 [13]

Answer:

42 Dimes, 10 Nickels.

Step-by-step explanation:

Dimes are worth $0.10, nickels are worth $0.05.

If D = number of dimes, and N = number of nickels, then the following equations are true:

0.10D + 0.05N = 4.70

D + N = 52

Next, let's multiply the first equation by 10 so that we can subtract the second one from it.

D + 0.50N = 47

(-) D + N = 52

Subtracting the second equation from the first one gives:

-0.5N = -5

-0.5N/-0.5 = -5/-0.5

N = 10

Finally, substitute N in the original second equation to find D.

D + 10 = 52

D + 10 - 10 = 52 - 10

D = 42

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3 years ago

In a year, there are 12 months. Seven months have 31 days. How many have 28 days? *

Nataliya [291]

Answer:

ALLL OF THEM 12

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Identify the factors of x2 + 25y2. ...?

Sveta_85 [38]

Is the equation like this? x^2 + 25y^2?
If the equation is like that, the answer would be (x-5y)^2 or (x-5y)(x-5y).
how did I get this? Just divide the factors or the get the square root of 25y^2 and it would be 5y. Then just try if it is positive or negative. In this case, it is negative because there is no factor w/ no exponential form. I hopemy answer helped you.

4 0

4 years ago

What is the best estimate for the product of 289 and 7

Katarina [22]

I would estimate it as (300 x 7) = 2100

Then I would subtract (11 x 7) + 77 from that to get the exact answer of 2023

~~~~~~~~~~
I didn't use a calculator or paper. The 'trick' is to notice that 289 = (300 - 11)

7 0

3 years ago

Three of exterior angle of n-sided polygon are 50° each two of it's interior angle are 127° and 135° and the remaining interior

irga5000 [103]

Answer:

The value of n is 21.

Step-by-step explanation:

We are given that three of the exterior angle of the n-sided polygon are 50° each two of its interior angle are 127° and 135° and the remaining interior angle are 173 each.

As we know that the sum of all exterior angles of the polygon is 360°. Also, the number of remaining interior angles will be (n - 5).

And, the exterior angle = 180° - the interior angle.

So, according to the question;

$(3 \times 50) + (180-127) + (180 - 135) + (n - 5)\times (180-173) =360$

150 + 53 + 45 + 7(n - 5) = 360

248 + 7n - 35 = 360

213 + 7n = 360

7n = 360 - 213

7n = 147

n = $\frac{147}{7}$

n = 21

Hence, the value of n is 21 and this is a 21-sided polygon.

4 0

3 years ago