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4 years ago

Find the value of x. 3x, 2x, 55

Mathematics

1 answer:

SOVA2 [1]4 years ago

7 0

The sum of the measures of the angles in a triangle is 180°.

Therefore we have the equation:

2x° + 3x° + 55° = 180°

5x° + 55° = 180° <em>subtract 55° from both sides</em>

5x° = 125° <em>divdie both sides by 5</em>

x° = 25°

<h3>Answer: x = 25</h3>

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3. Marcus's family has completed 30% of a trip. They have traveled 21 miles.

vlada-n [284]

Answer: 70 miles

Step-by-step explanation: scince the trip is 30% finished and that 30% was 21 miles you just have to multiply 21 by 3 which is 63and than you have to figure out what 1 third of 21 is which is 7 and than you just have to add 7 to 63. Hope this helps

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3 years ago

A full strip plus another half of a strip of staples contains 315 staples

Temka [501]

Answer:

$210 staples$

Step-by-step explanation:

Lets solve this equation:

$x(fullstrip)+\frac{1}{2}x(halfstrip)=315.$

Combine terms:

$x+\frac{1}{2}x=\frac{3}{2}x \frac{3}{2}x=315$

$x=315*\frac{2}{3}$

$x=210$

So a full strip contains 210 staples.

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3 years ago

Please help me with this. i don't understand it.

Vika [28.1K]

Answer:

A. 11160 cubes B. 1395cm^3

Step-by-step explanation:

Volume= length x width x height

Its easiest to solve B. first and use it to solve A.

B. 7.5 x 12 x 15.5 = 1395cm^3 (volume of prism)

A. .5 x .5 x .5 = 1/8cm^3 (which is the volume of the cube)

1395 ÷ 1/8 = 11160

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3 years ago

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3 years ago

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Nana76 [90]

Answer:

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