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diamong [38]
3 years ago
10

Please help I don't understand

Mathematics
1 answer:
valina [46]3 years ago
6 0
17) The line that is John is closer to certain but not exactly on certain so I'd say it's "likely"

18) Using that same example as the one above, if 0 means impossible, then 1 means certain. I'd place your label for Sara at 1. 

19) Let s = sides of the square. There are 4 sides and all sides are equal so we can set up the equation 4s = 64. Divide both sides by 4. s =  16. Now add 2 to this. 16 + 2 = 18. The length of each side of the original square was 18.

20) If the scale is 1 cm : 1 meter and the height of the model is 16 cm, then the actual plane must be 16 meters. 

21) 2x and 100 are supplementary angles meaning together they must add up to 180.

2x + 100 = 180
2x = 180 - 100
2x = 80
Divide both sides by 2
x = 40

22) Assuming 3x is supposed to be the right angle, right angles are 90 degrees. 

3x = 90
Divide by 3 on both sides
x = 30. 
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The amount of sales tax on a new car is directly proportional to the purchase price of the car. Victor bought a new car for $30,
Airida [17]

Answer:

Rita paid 47,500 dollars for the purchase price.

Step-by-step explanation:

We are given the sales tax on a new car is directly proportional to the purchase price of the car which means there is is something k such that

when you multiply it to the sales tax you get the purchase price.

Let's set this equation:

y=kx

Let y represent the purchase price and x the sales tax.

The second sentence tells us that (x,y)=(1500,30000).

We can plug this into y=kx to find the constant k.  (Constant means it stays the same no matter what the input and output is).

So we have:

30000=k(1500)

300    =k(15)      I went ahead and divided previous equation by 100.

Now divide both sides by 15:

300/15=k

Simplify:

20=k

So the equation to use the answer the question is

y=20x

where y is purchase price and x is sales tax.

So we want to know the purchase price on a car if the sales tax is 2375.

So replace x with 2375:

y=20(2375)

y=47500

3 0
3 years ago
Read 2 more answers
Anna has a coin and a number cube. What is the probability that she flips a heads, and rolls a 3 or 5?
eduard

Answer:

1/6 chance

Step-by-step explanation:

1/2 multiplied by 1/3

5 0
3 years ago
Factor completely: (3a+6)^2
zvonat [6]
(3(a+2))^2 factored
4 0
3 years ago
Marneshia walked three over eight of a mile in three over five of an hour. What equation can be used to calculate her unit rate
lana [24]
The answer is a (three eights over three fifths= five eights) 
3 0
4 years ago
Read 2 more answers
Solve for x 8 is to 64 as 2 is to X
KIM [24]
8 is to 64 as 2 is to 16

x=16
5 0
3 years ago
Read 2 more answers
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