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2 years ago

Estimate each percent: 50% of 39

Mathematics

2 answers:

vova2212 [387]2 years ago

8 0

Answer:

19.5

Step-by-step explanation:

39 x 0.50 = 19.5

likoan [24]2 years ago

6 0

For a future reference, for these types of questions you would divide the percentage by 100. So in this case would be 0.50 then you would take the whole number which is the 39, and you would multiply it by .50 so your final answer is 19.5

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

The volume of two similar solids are 128 m3

arsen [322]

Answer:

Solution given:

The volume of two similar solids are 128 m³

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surface area of larger solid is 250m²

let surface area of smaller solid be x.

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3 years ago

Which expression is equivalent to 2^4 ⋅ 2^−7?

yaroslaw [1]

Remember
$(x^m)(x^n)=x^{m+n}$
and
$x^{-m}=\frac{1}{x^m}$

so
$(2^4)(2^{-7})=$
$2^{4-7}=$
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2 years ago

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the length of a rectangular garden is 3 m greater than the width. The area of the garden is 70m squared. find the dimensions of

Lerok [7]

A = l x w

so you know that the length is 3m longer than the width, so you could use a formula to represent that

w = l + 3

you then substitute the second equation into the first to solve for l

70 = l x (l +3)
70 = l^2 + 3l

you could then rearrange the formula and solve for l using the quadratic formula

0 = l^2 + 3l - 70

l = -3 +- (square root (3)^2 - 4(1)(70)) / 2(1)
l = -3 +- (square root 9 + 280) / 2
l = -3 +- (square root 289) / 2
l = -3 +- 17 / 2

then you solve for the two seperate roots

l = -3 + 17 /2
l = 14 / 2
l = 7

or

l = -3 - 17 / 2
l = -20 / 2
l = -10

since a length cannot be negative, this root is not viable. therefore l = 7

to solve for w you would use

w = l + 3
w = 7 + 3
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hope this helps! if you did not understand a step or concept please let me know!

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3 years ago