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siniylev [52]
3 years ago
12

The sum of 4 times a number and -3 added to 9 times the number

Mathematics
1 answer:
Phoenix [80]3 years ago
5 0

Answer:

The sum of 4 times a number and -3 added to 9 times the number is:

4x + (-3 + 9x)

Step-by-step explanation:

Determine what each of the words means

"the sum of" - you are going to be adding the following two numbers.

"4 times a number" - Let x be the number, so, 4x is the first number.

"and -3 added to" - again, it's going to be addition of this number and the following number.

"9 times the number" - let x be the number, so, 9x is the second number in the second addition.

Now that we know what it all means, put it together:

4x + (-3 + 9x)


I really hope this helps you =)

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A person invests 7000 dollars in a bank. The bank pays 5.5% interest compounded
kotykmax [81]

The time required to get a total amount of $13,200.00 with compounded interest on a principal of $7,000.00 at an interest rate of 5.5% per year and compounded 12 times per year is 11.559 years. (about 11 years 7 months)

Answer:

t = 11.559 years

<h3>Compound Interest </h3>

Given Data

  • Principal P= $7000
  • Rate r= 5.5%
  • Final Amount A = $13200
  • Time t = ??

(about 11 years 7 months)

Calculation Steps:

First, convert R as a percent to r as a decimal

r = R/100

r = 5.5/100

r = 0.055 per year,

Then, solve the equation for t

t = ln(A/P) / n[ln(1 + r/n)]

t = ln(13,200.00/7,000.00) / ( 12 × [ln(1 + 0.055/12)] )

t = ln(13,200.00/7,000.00) / ( 12 × [ln(1 + 0.0045833333333333)] )

t = 11.559 years

Learn more about compound interest here:

brainly.com/question/24924853

6 0
2 years ago
a survey indicated that 5 out of 8 doctors used brand X aspirin. If 4000 doctors were surveyed, how many used brand X?
fredd [130]

Answer:

2500 doctors

Step-by-step explanation:

4000/8= 500

500x5=2500

8 0
4 years ago
Scott has 10 1/2 yd of fabric to make banners for the community fair. He needs 1 3/4 yd for each banner.
Free_Kalibri [48]
(10 1/2) / (1 3/4) =
10.50 / 1.75 =
6 <== he can make 6 banners
7 0
4 years ago
Tyrone invested money for 3 years at 5% interest. If the interest paid was $60, how much money was invested? What was the total
yan [13]

Answer:

He invested $1200 and had a balance of $1260 after 3 years.

3 0
3 years ago
Use PEMDAS to simplify the expression.<br> 7 715-221<br> 2<br> + 10 - (5 x 23)
Bogdan [553]

Answer:

5398

Step-by-step explanation:

7715-2212+10-(5x23)

7715-2212+10-115

5503+10-115

5513-115

5398

3 0
3 years ago
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