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Ray Of Light [21]
3 years ago
5

On a drawing of a model airplane, the scale used is 1 in.:3 ft. How many feet would 4.5 inches represent?

Mathematics
1 answer:
AnnyKZ [126]3 years ago
6 0

Answer:

A. 13.5ft

Step-by-step explanation:

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To select a sample of five children from a class of 30, a researcher puts each child’s name on a slip of paper, then shuffles th
Ainat [17]

Answer:

We conclude that  a researcher  used simple random sample.

Step-by-step explanation:

We know that select a sample of five children from a class of 30, a researcher puts each child’s name on a slip of paper, then shuffles the papers in a hat and randomly picks five names.  

We conclude that  a researcher  used simple random sample.

Because every children  has an equal chance of being included in the sample.

7 0
3 years ago
Simplify each expression 8+7y-3y+2-4
Kobotan [32]

Answer:

6+4y

Step-by-step explanation:

8 0
3 years ago
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PLEASE NO LINKS, I will report you.
FromTheMoon [43]

Answer:

for 18 x is 6 and for 20 it is 11

Step-by-step explanation:

For 18, since -1+2x and 5+x is the same thing, set up and equation. WE can simplify to -1+x=5 and then we get x=6

For 20, 18 is 11 since 18=-4+2x. If we simplify we get 22=2x then we can use algebra to say that x=11

Hope this helps :)

7 0
2 years ago
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Solve the equation below and find the variation constant, k .Find y when x = 7 and z=5, if y varies jointly as x and 2, and y= 1
Vlada [557]
<h3>Answers:</h3>

Variation Constant: k = 7/6

y = 245/6 when x = 7 and z = 5

====================================

Explanation:

"y varies jointly as x and z" means that y = kxz

We have (x,y,z) = (4,14,3) as one triple, so,

y = kxz

14 = k*4*3

14 = 12k

12k = 14

k = 14/12

k = 7/6 is the variation constant

The equation goes from y = kxz to y = (7/6)xz

----------------

Plug in x = 7 and z = 5 to find y

y = (7/6)xz

y = (7/6)*7*5

y = (7/6)*(7/1)*(5/1)

y = (7*7*5)/(6*1*1)

y = 245/6

4 0
3 years ago
Find the value of the expression.<br> c²b<br> for b = 5 and c = 3
kicyunya [14]

Answer:

45

Step-by-step explanation:

c^2*b

We know that c is 3, and b is 5, so we can substitute them in

3^2*5

Solve the exponent first

9*5

Multiply

45

7 0
3 years ago
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