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Elan Coil [88]
2 years ago
7

Donald bought 3 shirts for $45. How many shirts can Donald buy if he has $30? Show your work using mathematics.

Mathematics
2 answers:
serg [7]2 years ago
6 0

Answer:2 shirts

Step-by-step explanation: if you divide 45$ by three you find out each shirt cost 15$ if you add fifteen twice you get 30$ theirfor you used all your money and can not buy another shirt.

horsena [70]2 years ago
4 0

Answer:

donald can buy 2

Step-by-step explanation:

price of a shirt = $45÷3

=15

=30÷2=15

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At 10 percent interest, how long does it take to quadruple your money?
horsena [70]

It takes about 14.55 years for quadruple your money

<em><u>Solution:</u></em>

Given that,

At 10 percent interest, how long does it take to quadruple your money

Rule of 144:

The Rule of 144 will tell you how long it will take an investment to quadruple

Here,

Rate of interest = 10 %

Therefore, number of years to quadruple your money is obtained by dividing 144 by 10

<em><u>Rule of 144 Formula: </u></em>

N = \frac{144}{R}

Where:

N = Number of many years times.

144 = Is the constant variable.

R = Rate of interest.

\rightarrow N =  \frac{144}{10} = 14.4

Thus it takes about 14.4 years for quadruple your money.

<em><u>Another method:</u></em>

If initial amount is $ 1 and it if quadruples it should be $ 4

We have to find the number of years if rate of interest is 10 %

Let "n" be the number of years

Then we can say,

Amount = Principal(1+\frac{R}{100})^n

4 = 1(1+\frac{10}{100})^n

4 = 1(1+0.1)^n\\\\4= 1(1.1)^n\\\\4 = 1.1^n\\\\We\ know\ that,\\\\(1.1)^{14.55} = 1.1^n\\\\We\ know\ that\\\\If\ a^m = a^n\ then\ m = n\\\\Therefore,\\\\14.55 = n\\\\n = 14.55

Thus Option D 14.55 years is correct

7 0
3 years ago
X^2 - 10x + 24 = 024
Ivahew [28]

Answer:

x=0,10

Step-by-step explanation:

4 0
2 years ago
I bought a box of granola bars at the store that has a volume of 210 cubic centimeters
Naya [18.7K]

Answer:

a and c

Step-by-step explanation:

The volume (V) of a cuboid is

V = lwh ( l is length, w is width, h is height )

The volume is given as 210 cm³

Check each of the dimensions given to determine which give the correct volume

a

V = 15 × 2 × 7 = 210 ← correct volume

b

V = 14 × 3 × 7 = 294 ← incorrect volume

c

V = 7 × 3 × 10 = 210 ← correct volume

Hence a and c  could be the dimensions of the box


6 0
3 years ago
Read 2 more answers
There are 10 dogs and 4 leave.What is the percent change?<br><br> But can you explain it to me plzz
Vera_Pavlovna [14]

Answer:

the percent change would be 40 percent

Step-by-step explanation:

think of 10 as a base so like 100 ok and you know if 50 of that is 50 percent 40 would just be forty percent

8 0
3 years ago
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BC=6x+4 AC=52 and AB=4x+8 find BC
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The awnser to this is 10x
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