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Alecsey [184]
2 years ago
5

Twenty seven decreased by three times a number is the same as 7 times the sum of the number plus 1. What is the number?

Mathematics
1 answer:
Anika [276]2 years ago
6 0

Answer:

2.6

Step-by-step explanation:

Let the number be x

27-3x= 7x+1

26=10x

x=2.6

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my son had his 18 months visit to the doctor last week.the nurse took several measurement while we were there.his length(height)
nikitadnepr [17]

18 months ……33inches, weight 25.5 pounds

When he was born = 9 months…20 inches, weight 8, 4 pounds

Every 9 months his height growth is 33-20 = 13 inches, his weight is 25.5-8.4=17.1 pounds 

<span>Pounds.  This means, for every 9 months, his growth is 13 inches and his weight is 17.1 pounds. For example we can determine his growth in 3 years.</span>

<span>3 years = 36 months, 36= 9*4, his height will be 4*13 inches= 52 inches, his weight will be 4*17.1 = 68.4 pounds </span>

8 0
3 years ago
Can someone help??plzzz..
Sav [38]
When you are multiplying 2 numbers with exponents, you need to add the exponent. When you multiply an exponent with an exponent, you multiply them.

So,
(3^2 x 7^4) ^9
First multiply the base and add exponents = ( 21^6) ^9
= 21 ^6x9
21^54
The same rule applies for variables, just pretend there is an imaginary 1.
4 0
3 years ago
f the principal is $350 and the interest rate is 3 percent, what is the simple interest earned in one year?
damaskus [11]

Answer:

$10.50

Step-by-step explanation:

The formula is Balance= Principle (starting amount) x Time x Interest rate. 350 x .03 x 1 is $10.50.

8 0
2 years ago
Which model represents 2.36 ÷ 4? A. Three groups of three tenths and four hundredths B. Three groups of five tenths and nine hun
Nimfa-mama [501]

Answer:

Five groups of five tenths and nine hundredths

Step-by-step explanation:

Mathematically;

2.36 divided by 4 = 0.59

So we want to select from the options, the best representation of this

That will be

0.5 + 0.09

so our answer is 5 groups of five tents and nine hundredths

4 0
2 years ago
If the mass of a proton is 2.53 x 10^-37 gram, what is the mass of 1,000 protons
Dmitrij [34]
We can solve this problem by the rule of three.

1000 protons=10³ protons

1 proton------------------2.53*10⁻³⁷g
10³ protons----------   x

x=(10³ protons  *   2.53*10⁻³⁷) / 1 proton=2.53*10⁻³⁷⁺³ protons=
=2.53*10⁻³⁴ protons

answer: 2.53*10⁻³⁴ protons
3 0
3 years ago
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