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shutvik [7]
3 years ago
10

Double the sum of a number and three is the same as the number subtracted by nine

Mathematics
1 answer:
OleMash [197]3 years ago
4 0

Answer:

2(n+3) = n-9

Step-by-step explanation:

2(n+3) = n-9

Step 1: Multiply (n+3) by two; 2n + 6

Step 2: Subtract n on both sides; n+6= -9

Step 3: Subtract 6 on both sides; n= -9 - 6

Step 4: Add -9 and -6; -15

Solution: n= -15

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Which steps should be followed to write an equivalent ratio to find 2% of 6700? Write 2% as the ratio StartFraction 200 Over 100
Andrej [43]

Answer:

Step-by-step explanation:

To evaluate the expression 2% 0f 6700, we can follow the steps;

2% = 2/100

6700 = 67(100)

2% of 6700 = 2/100 * 67(100)

The 10 at the numerator will cancel out that at the denominator

2/100 * 67(100) = 2(67)

2(67) = 134

5 0
3 years ago
What's is 2+5 times 18 please answer fast<br><br> Free 100 points
Fantom [35]

Answer:

92

Step-by-step explanation:

5 times 18=90

90+2=92

you do times first because order of operations.

5 0
3 years ago
Read 2 more answers
A mold professional uses an antimicrobial chemical in an attic to combat a colony of mold. If the initial number of mold spores
kykrilka [37]

It would take about 57 hours for the number of spores to be less than 500 spores.

<h3>Exponential Function</h3>

An exponential function is in the form:

y = abˣ

Where y,x are variables, a is the initial value of y and b is the multiplication factor.

Let y is the number of pores after x hours.

a = 6200, b = 100% - 20% = 0.8, hence to be less than 500 spores:

6200(0.8)^\frac{x}{5} < 500

(x/5) * ln(0.8) < ln(0.08)

x > 56.4 hours

It would take about 57 hours for the number of spores to be less than 500 spores.

Find out more on Exponential Function at: brainly.com/question/12940982

4 0
2 years ago
I need help what is 0.7 repeating in fraction form can someone explain I need it really bad!!!!! (Simplest form)
MakcuM [25]

Answer:

7 over 9 so 7/9

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Can someone help me please
masha68 [24]
Answer:
17 inches

Explanation:
The Pythagorean theorem states that a^2+b^2=c^2 when c is the longest side (the hypotenuse) and a and b are the other two sides. This theorem can only be applied to right triangles.

First, plug the values into the formula.
a^2+b^2=c^2
8^2+15^2=c^2
64+225=c^2
289=c^2
Take the square root of both sides
c=17

I hope this helps!
5 0
2 years ago
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