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2 years ago

The sum of a number and nine is fifteen Write an equation to represent the sentence

Mathematics

1 answer:

jeka57 [31]2 years ago

8 0

Answer:

x+9=15

Step-by-step explanation:

a number plus 9 is fifteen

let x represent the unknown number

x+9=15

:) ur welcome

hope this helped

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What is the slope of the line in the graph?

sineoko [7]

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Find which term in the geometric sequence 1,3,9,27,... is the first to exceed 7,000.

Zielflug [23.3K]

The common ratio between terms is 3, so the sequence has general $n$ -th term

$a_n=3^{n-1}$

for $n\ge1$ . The term exceeds 7000 when

$3^{n-1}>7000\implies n-1>\log_37000\implies n>1+\log_37000\approx9.06$

which means the first time $a_n$ exceeds 7000 occurs when $n=10$ . Indeed,

$a_{10}=3^{10-1}=19,683$

while the previous term would have been

$a_9=3^{9-1}=6561$

8 0

3 years ago

Suppose you decide to put $12,500 in an account earning 9% interest compounded quarterly. How much interest would you earn after

Vesnalui [34]

Step-by-step explanation:

you add 9% to a number by multiplying that number by 1.09.

because adding 9% gives us in the end 109% of the original amount.

anyway, the formula for quarterly compounded interest is

Cq = P [ (1+r)^(4*n) – 1 ]

P is the starting principal amount

r is the interest rate per quarter (= interest rate / 4)

n would be the number of years (= 1 in our case).

so, the interest after 1 year is

12500((1 + 0.09/4)⁴ - 1) = 12500(1.0225⁴ - 1) =

= 12500 × 0.093083319 = $1,163.541485 ≈ $1,163.54

8 0

1 year ago

What is 2/5 + 7/15 ?

Whitepunk [10]

Answer:

Decimal Form: 0.86

Not sure if you would've preferred a step-by-step solution. Sorry! Hope you find this helpful, good luck!

3 0

3 years ago

7. The length of a rectangle is two more than its width. The perimeter of the rectangle is 36 feet. What are the dimensions (len

Reika [66]

Step-by-step explanation:

length = x + 2

width = x

x + x + (x+2) + (x+2) = 36 ft

4x + 4 = 36 ft

4x = 32 ft

x = 32 ÷ 4

x = 8 ft

dimensions = length x width

= (x+2) × x

= (8+2) × 8

= 10 ft × 8 ft

5 0

2 years ago