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Alex Ar [27]
3 years ago
15

Y varies directly as x If y= 90 and x =10 find y if x = 7

Mathematics
1 answer:
den301095 [7]3 years ago
5 0

Answer:

Y = 63

Step-by-step explanation:

I think if x and y are proportional when y is 90 and x is 10 then that would mean that x multiplied by 9 would equal y so:

7 x 9 = 63

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Hillel is juggling flaming torches to raise money for charity. His initial appearance raises $500, and he raises $15 for each mi
Sauron [17]

Answer:

R(t)=15t+500

Step-by-step explanation:

Let R be the amount of money Hillel raises is a function of t, the length of his performance in minutes.

We have been given that Hillel raises $15 for each minute of juggling performance. This means that change in amount of money with every minute of juggling performance is 15, so slope of our line will be 15 and money raised in t minutes of performance will be 15t.

His initial appearance raises $500, so 500 will be our y-intercept.

The total money raised by Hillel after t minutes of juggling performance will be: 500+15t.

Since we know that line of an equation in slope-intercept form is: y=mx+b, where,

m = slope of line,

b = y-intercept.

We are also given that R is a function of t, so substituting our given values in slope-intercept form of equation we will get our function formula as:

R(t)=15t+500

Therefore, the function R(t)=15t+500 gives the amount R of money Hillel raises in t minutes of juggling performance.


6 0
3 years ago
Read 2 more answers
What’s the square root of 3
belka [17]
According to my calculations. The answer to this question is 89
5 0
4 years ago
Read 2 more answers
Bob won a $200,000 lottery. He invests part of the money in real estate with an annual return of 3% and the rest in a money mark
SVETLANKA909090 [29]

Answer:

Bob invested $50,000 in real state and $150,000 in a money market.

Step-by-step explanation:

Assuming that x is the investment in real state:

(200,000-x)*0.045 + x * 0.03 = 8,250

Apply distributive property:

(200,000*0,045) - 0.045x +0.03x = 8,250

9,000 - 0.045x +0.03x = 8,250

We must clear x:

- 0.045x +0.03x = 8,250 - 9,000

-0.015x = -750

x = -750/-0.015

x = 50,000

So, the invest in real state is $50,000.

$200,000 - $50,000 = $150,000 is the invest in a money market.

4 0
3 years ago
The price of gas on Wednesday was $2.03/gallon. On Friday, the price of gas was $2.26. What is the percent change in the price o
Vika [28.1K]

Answer:

Percent change in the price of gas is 9.85\%

Step-by-step explanation:

Percentage change equals the change in value divided by the absolute value of the original value, multiplied by 100 .

\text { Percentage Change }=\frac{\Delta V}{\left|V_{1}\right|} \times 100

Here

\Delta V=2.26-2.03\\\\=0.23\$/gallon

V_{1}=2.03\$/gallon

The percent change in the price of gas

=\frac{0.23}{2.03} \times100\\\\=9.85\%

Percent change in the price of gas is 9.85\%

4 0
3 years ago
The measures of the exterior angles of an octagon are x°, 2x", 3x°, 4x °, 6x°, 7xº,
Neporo4naja [7]

Answer:

216

Step-by-step explanation:

Total of octagon amount is 1080, so set it equal.

x + 2x + 3x + 4x + 6x + 7x + 8x + 9x = 1080

45x = 1080

/45     /45

x = 24

Then plug in for largest number.

9 (24) = 216

8 0
3 years ago
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