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Aleksandr-060686 [28]
3 years ago
14

Lexie is making a model of the Empire State Building. The scale of the model is 1 inch = 9 feet. The needle at the top is 31.5 f

eet tall. How big should the needle be on the model?
Mathematics
2 answers:
Alex787 [66]3 years ago
8 0
The needle at the top of the model should be 3.5 inches.
torisob [31]3 years ago
5 0

Answer:

3.5 inches

Step-by-step explanation:

Set up a proportion:

\frac{9 ft}{1 in} = \frac{31.5 ft}{x in}

Cross multiply in order to solve for x:

9x = 31.5

Divide by nine:

x = \frac{31.5}{9}

Simplify:

x= 3.5

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How do I graph {3,1,-1,-3}​
nalin [4]
This is very sloppy but u hope it helps
6 0
3 years ago
The product of two consecutive integers is 5 more than three time the larger. What are the integers?
kvasek [131]
When calculating consecutive integers, the smaller number is x and the larger number is (x + 1).
So the equation you can use is x + (x + 1) = 5 + 3(x + 1)
This is because the sum of the consecutive integers are equal to 5 more than 3 times the larger integer.
Now simplify:
x + (x + 1) = 5 + 3(x + 1)
2x + 1 = 5 + 3(x + 1)
2x + 1 = 5 + 3x + 3
2x + 1 = 3x + 8
Now isolate the variable:
2x + 1 = 3x + 8
Subtract 2x from both sides:
1 = x + 8
Subtract 8 from both side:
-7 = x
x = -7
So the smaller number is -7 and the larger number is -6.

Now check your answer:
-7 + (-7 + 1) = 5 + 3(-7 + 1)
-7 + (-6) = 5 + 3(-7 + 1)
-7 + (-6) = 5 + 3(-7 + 1)
-7 - 6 = 5 + 3(-7 + 1)
-13 = 5 + 3(-7 + 1)
-13 = 5 + 3(-6)
-13 = 5 + (-18)
-13 = 5 - 18
-13 = -13
This works!

So the integers are -7 and -6.
7 0
3 years ago
3x+5=245<br><br> Helpppppppppppp
SOVA2 [1]

<em>Answer:</em>

<em><u>X = 80</u></em>

<em>Step-by-step explanation:</em>

<em>Subtract </em><em>"5"</em><em> from both sides,</em>

<em>3x + 5 - 5 = 245 - 5</em>

<em><u>Simplify,</u></em>

<em>3x = 240</em>

<em><u>Divide both sides by </u></em><em><u>"3"</u></em><em><u>,</u></em>

<em>3x/3 = 240/3</em>

<em>X = </em><em>80</em>


<u><em>Hope this helps :-)</em></u>

8 0
3 years ago
Read 2 more answers
Please help me answer question 12
olasank [31]

Answer:

x = 81, y = 68, z = 99

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Consider the triangle on the left, then

x = 180 - (36 + 63) = 180 - 99 = 81

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

x is an exterior angle of the triangle on the right, thus

13 + y = x , that is

13 + y = 81 ( subtract 13 from both sides )

y = 68

Consider the triangle on the right

z = 180 - (13 + y) = 180 - (13 + 68) = 180 - 81 = 99

8 0
2 years ago
Stefan is making meringue with eggs whites and sugar. he uses 50 grams of sugar for every egg white.
RoseWind [281]

Answer:

500

Step-by-step explanation:

1=50 and 50 x 10 = 500

5 0
3 years ago
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