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Lilit [14]
3 years ago
12

Solve for please :):)

Mathematics
1 answer:
Debora [2.8K]3 years ago
7 0

Answer:

x=20

Step-by-step explanation:

x+2x+x+10=90

4x+10=90

4x=90-10

4x=80

x=80/4

x=20

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The surface areas of two similar hexagonal prisms are 882cm² and 1,058 cm²? What is the scale factor of the smaller
max2010maxim [7]

Answer:

scale factor of the smaller  prism to the larger prism is B. 21/23

Step-by-step explanation:

Given

surface areas of two similar hexagonal prisms are 882cm² and 1,058 cm²?

scale factor is ratio of sides of two similar objects

thus scale factor for given prism will be = side of smaller prism / side of larger prism

in general rule

If shape of solid has scale factor of k

scale factor of area = k²

scale factor of volume = k³

_____________________________

Given in the problem area of two prism is given

we know area = side^2

scale factor of area = k²

k^2 = area of smaller prism / area of larger prism

k^2 = 882 / 1058 = 441/529\\k = \sqrt{ 441/529} \\k = 21/23

Thus, correct option is B 21/23.

7 0
3 years ago
Please help with both if you can!<br><br> Thank you!
Alexxandr [17]

Answer:

15). is done

16).

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8 0
3 years ago
Which model or expressions represents the sum 2.84 + 1.2
irakobra [83]

Answer:

4.04

Step-by-step explanation:

2.84 + 1.2 = 4.04

4 0
3 years ago
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d1i1m1o1n [39]

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Step-by-step explanation:falo inglês

3 0
3 years ago
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Find the quotient. Simplify if possible -6/10 + (-5/7)
Zepler [3.9K]

Answer: The correct answer is \frac{21}{25}

Step-by-step explanation:

To find a quotient, we need to divide the two numbers. The equation given to us is :

\frac{-6}{10}\div \frac{-5}{7}

To Simplify the above equation and finding out the quotient, we need to divide the above equation, we get:

\Rightarrow \left(\frac{\frac{-6}{10}}{\frac{-5}{7}}\right)

Taking the reciprocal of the denominator and multiplying it with the numerator, we get:

\Rightarrow \frac{-6}{10}\times \frac{7}{-5}\\\\\Rightarrow \frac{42}{50}\\\\\Rightarrow \frac{21}{25}

Hence, the correct answer is \frac{21}{25}

5 0
3 years ago
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