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xeze [42]
4 years ago
14

What is 9 times 52 using mental math property

Mathematics
1 answer:
arsen [322]4 years ago
3 0
Everyone works differently in mental meth.

To calculate 9*52, we note that 9=10-1, so mentally calculate
9(52)
=(10-1)(52)
=520-52   [ subtract 20 from each number]
=(520-20)-(52-20)  
=500-32
=468.

Alternatively,
9*52=9*50+9*2=450+18=468

If  you're good with multiplication and division,
9*52=3*3(52)=3*156=450+18=468


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Cindi deposited $300 at 7.5% simple interest rate. How much interest will she earn after 5 years?
pav-90 [236]

Answer:

$431

Step-by-step explanation:

using the formula P(1+r/100)^n,

we can substitute the P with $300,

substitute the r with 7.5%,

and substitute the n with 5.

8 0
3 years ago
Area and percent . ​
siniylev [52]

Answer:

a. 61.92 in²

b. 21.396 ≈ 21.4%

c. $4.71

Step-by-step explanation:

a. Amount of waste = area of rectangular piece of stock - area of two identical circles cut out

Area of rectangular piece of stock = 24 in × 12 in = 288 in²

Area of the two circles = 2(πr²)

Use 3.14 as π

radius = ½*12 = 6

Area of two circles = 2(3.14*6²) = 226.08 in²

Amount of waste = 288 - 226.08 = 61.92 in²

b. % of the original stock wasted = amount of waste ÷ original stock × 100

= 61.92/288 × 100 = 6,162/288 = 21.396 ≈ 21.4%

c. 288 in² of the piece of stock costs $12.00,

Each cut-out circle of 113.04 in² (226.08/2) will cost = (12*113.04)/288

= 1,356.48/288 = $4.71.

3 0
4 years ago
Jordan has $55 she earns $67 by doing chores how many money does Jordan have now
scZoUnD [109]
$122 because if you add 55 + 67 you get 122 then you just add the dollar sign
4 0
3 years ago
Read 2 more answers
Which method could be used to factor x2 - 25?
Mandarinka [93]

Answer:

A. Perfect square Trinomial

Step-by-step explanation:

Just did its

6 0
3 years ago
Read 2 more answers
HELP ASAP!!!!!!!!!!
chubhunter [2.5K]

Answer:

7.5

Step-by-step explanation:

\sqrt{0\\.3} = 0.5477225575

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Hope this helped. :)

5 0
3 years ago
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