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SVEN [57.7K]
3 years ago
12

719 = (78 × 9) + ____ find the unknown number

Mathematics
2 answers:
madreJ [45]3 years ago
6 0

Answer:

The unknown answer is 17

Step-by-step explanation:

78 x 9= 702

719-702=17

viva [34]3 years ago
4 0

Answer: 17

Step-by-step explanation:

78 x 9

=702

702 -719

= 17

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$7000 is compounded semiannually at a rate of 11% for 21years Find the total amount and round to the nearest cent
photoshop1234 [79]

\text{Given that }\$7000 \text{ is compounded semiannualy at a rate of }11\% \text{ for 21 years}\\
\\
\text{we know that the amount after t year when compounded is given by}\\
\\
A=P\left ( 1+\frac{r}{n} \right )^{nt}\\
\\
\text{here P is the principal amoount, so }P=7000,\\
\\
\text{r is the interest rate, }r=11\%=0.11\\
\\
\text{n is the number of times in a year, here semiannulay, so }n=2,\\
\\
\text{and t is the time, so }t=21\\
\\
\text{so the amount after 21 years is}

A=7000\left ( 1+\frac{0.11}{2} \right )^{2(21)}\\
\\
\Rightarrow A=7000\left ( 1+0.055 \right )^{42}\\
\\
\Rightarrow A=7000\left ( 1.055 \right )^{42}\\
\\
\Rightarrow A\approx 66328.68

So the amount after 21 years is: $66328.68

7 0
3 years ago
The sale price for a computer is $450. the original price was first discounted by 25% and then was discounted an additional 20%.
pishuonlain [190]
Sale price = $450
original price = 25%y
dicount = +20%

solution = $450 × 45%
= $202.5
= $652.5

i am a mathematics teacher. if anything to ask please pm me
3 0
3 years ago
what is the answer to this question. please respond. I need the answer very quick.my teacher is going to get mad at me
amm1812

It is a ratio problem...

2 dogs need 144 feet = 2 : 144

Simplify the ratio = 1 : 72

Multiply both sides by 8 (8 dogs) = 1*8 :144*8

Simplify the ratio = 8 : 1152

8 dogs need 1152 feet of fencing

Hope this helps!

3 0
4 years ago
3 turtles walking.
Elenna [48]

Answer:

Divide 250 by 9.4 to get 26.6

Step-by-step explanation:

To calculate her unit rate, 1 minute, we must divide the distance travelled over 9.4 minutes by 9.4 to see how far she travelled in 1 minute.

8 0
3 years ago
Write the expression in radical form.
Effectus [21]
I think it would be B
6 0
3 years ago
Read 2 more answers
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