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dusya [7]
3 years ago
5

A 21 foot beam is to be cut into three pieces so that the second and the third piece are each 3 times the length of the first pi

ece if x represents the length of the shorter piece, find the lengths of all three pieces
Mathematics
1 answer:
mylen [45]3 years ago
6 0

x+3x+3x=21

7x=21

x=3

3, 9, 9=21

the answers are 3, 9, and 9

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Help me with my math ASAP!!!!
almond37 [142]

Answer:

f = 78

g = 3.5

Step-by-step explanation:

First we need to find f.

We can use the equation 72 + (f + 30) = 180 to solve for f.

We can then change that equation to 72 + f + 30 = 180, since the Commutative Property of Addition says that you can have any addition in any order.

Now, we can solve the equation.

102 + f = 180\\(102 - 102) + f = 180 - 102\\f = 78

Now that we solved f, we can now solve for g.

Since 25 equals 8g -3, we can solve the equation 8g - 3 = 25.

Here is how you solve it:

8g - 3 = 25\\8g + (-3 + 3) = 25 + 3\\8g = 28\\g = \frac{28}{8}

Since \frac{28}{8} equals 3.5, which is the simplest form, that is the answer.

Hope this helps, and please mark me brainliest! :)

3 0
3 years ago
To find the distance between (17,3) and (17,−5), Marcia used the following equation. Is Marcia correct? Explain. D=|3−(−5)|=8
Bumek [7]

Answer:

Step-by-step explanation:

The formula for finding the distance between two points is expressed as shown

D = √(x₂-x₁)²+(y₂-y₁)²

Given the coordinate (17,3) and (17,−5), from the coordinates x₁ = 17, y₁ = 3, x₂ = 17 and y₂ = -5.Substituting the values given into the formula;

D = √(17-17)²+(-5-3)²

D = √0²+(-8)²

D = √64

D = 8

According to the result gotten, it can concluded that Marcia is correct although she didn't use the right expression to calculate her distance. She should have taken the square root of the sum of the square of difference in the coordinates axis according to the formula used.

8 0
3 years ago
One of the angles of a regular dodecagon is 150°. What is the sum of the measures of all the interior angles of this dodecagon?
Kamila [148]

Answer:

D

Step-by-step explanation:

i think so but it will help you

8 0
3 years ago
4(1 + 9x)<br> i need assistance!
natta225 [31]
36x+4 is your answer
5 0
3 years ago
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lutik1710 [3]

Answer:

A rectangular football field is 64 meters wide and 100 meters long. A player runs from one corner of the firmed in a diagonal line to the opposite corner. ... How much shorter is it to run across the field than around it ( nearest tenth)? ... Substitute the length of the sides (7 in, 25in n) into the Pythagorean theorem.

Step-by-step explanation:

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3 0
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