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3 years ago

Find the number if 3/5 of it is 30

Mathematics

2 answers:

igor_vitrenko [27]3 years ago

7 0

Answer:

Step-by-step explanation:

$\frac{3}{5} = \frac{30}{a}$

cross multiply, so 3a= 30x5

simplifies to 3a= 150

a = 50

arsen [322]3 years ago

6 0

Answer:

The number is 50

Step-by-step explanation:

Use x to represent the unknown number

x(3/5) = 30

3/5x = 30

Multiply both sides of the equation by 5/3

5/3 * (3/5x) = 30/1 * (5/3)

x = 150/3

x = 50

The number is 50

Hope this helps :)

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What is a mixed number for 5/2

m_a_m_a [10]

Answer: 2 1/2

Step-by-step explanation: Divide using long division. The whole number portion will be the number of times the denominator of the original fraction divides evenly into the numerator of the original fraction, and the fraction portion of the mixed number will be the remainder of the original fraction division over the denominator of the original fraction. Hope this helps!! PLZ mark me!!!

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3 years ago

Write a inequality phrase: you have to be at least 21 years of age

SVETLANKA909090 [29]

Answer:

$a\geq 21$

Step-by-step explanation:

"At least" is inclusive, so you can be 21 years old.

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3 years ago

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how much would $150 invested at 8% interest compounded anually be worth after 13 years? A(t)=P(1+r/n)^

PIT_PIT [208]

$\bf ~~~~~~ \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &\$150\\
r=rate\to 8\%\to \frac{8}{100}\to &0.08\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{annually, thus once}
\end{array}\to &1\\
t=years\to &13
\end{cases}
\\\\\\
A=150\left(1+\frac{0.08}{1}\right)^{1\cdot 13}\implies A=150(1.08)^{13}\implies A\approx 407.9435589$

3 0

3 years ago

K - 263.48 = 381.09 solve this equation

Sedbober [7]

K-263.48=381.09
we add 263.48 on both sides
k=644.57

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3 years ago

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How do you answer the picture below?

3241004551 [841]

Answer:

42cm²

Step-by-step explanation:

because if the perimeter of the rectangle is 28 then the length is 5, 5 - 11 = 6, the formula for finding the trapezium is to add the 2 parallel sides, half them, then times them with the length so your sum will look like this, 5+9=14, (i knew the other side was 9 as the length of AB is the same as the length of FC, which is the one of the parallel sides of the trapezium) then we do 14÷2=7, finally we times 7 by 6 which is 42cm²

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3 years ago