All categories

3 years ago

NEED HELP NOW PLEASEEE, what algebraic expression must be added to the sum of 3x^2+4x+8 and 2x^2-6x+to give 9x^2-2x-5

Mathematics

1 answer:

Annette [7]3 years ago

4 0

Answer:

4x^2-13

Step-by-step explanation:

You might be interested in

The ratio of pencils to erasers is 4:1 if there are 20 pencils how many erasers are there? Kerion has a beaded necklace business

Misha Larkins [42]

Answer:

we express the ratio of pencil to eraser and multiply it by the number of the number of pencils and erasers. 4/5 * x=20 , so x=25, then it implies that there are 5 erasers.

7 0

3 years ago

Tim's phone service charges $23.02 plus an additional $0.19 for each text message sent per month. If Tim's phone bill was $27.77

xeze [42]

Answer:

Step-by-step explanation:

23.02 plus an additional 0.19 for each text.....x = # of texts

$ 0.19x + 23.02 = 27.77 is ur equation

3 0

3 years ago

3. March deposited money into an account in which interest is compounded quarterly at a rate of 3.3%. How much did he deposit if

aksik [14]

Answer:

$4125.

Step-by-step explanation:

When solving for the principal we still need to use the formula $A = P(1+\dfrac{r}{n})^{nt}$ .

Let's take all the variables that we do have available and list them out.

A = $4369.20

r = 3.3% or 0.033

n = 4 (Quarterly)

t = 21 months or 1.75 years

Now we can substitute the values and solve for the principal.

$A=P(1+\dfrac{r}{n})^{nt}$

$4369.20=P(1+\dfrac{0.033}{4})^{4(1.75)}$

$4369.20=P(1+0.00825)^{7}$

$4369.20=P(1.00825)^{7}$

$4369.20=P(1.05919912849)$

Now we need to divide both sides with 1.05919912849 to get the principal.

$\dfrac{4369.20}{1.05919912849}=\dfrac{P(1.05919912849)}{1.05919912849}$

P = 4125.00339406 or $4125.

To check for our answer, we can simply substitute the values including the principal and excluding the total.

$A=P(1+\dfrac{r}{n})^{nt}$

$A=4125(1+\dfrac{0.033}{4})^{4(1.75)}$

$A=4125(1+0.00825)^{7}$

$A=4125(1.00825)^{7}$

$A=4125(1.05919912849)$

$A=4369.19640502$ or $4369.20$

5 0

3 years ago

Find the area of the circle. Round your answer to the nearest hundredth.

Hoochie [10]

Area is 706.858, rounded is 707

6 0

3 years ago

Read 2 more answers

Which choice is equivalent to the product below when x is greater than 0?

zalisa [80]

I think that's ur answer

7 0

3 years ago