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galben [10]
3 years ago
9

If the temperature is dropping at a rate of 2° per hour how many hours will it take to drop 15°

Mathematics
1 answer:
Tju [1.3M]3 years ago
5 0

Answer:

7 1/2

Step-by-step explanation:

If it drops 2 per hour, and you need it to drop 15, divide 15 by 2 and you’ll get 7.5 or 7 1/2

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46 cents is what fraction of a dollar
Vikentia [17]
Since there are a 100 cents in a dollar. the 100 is the denominator.
46/100, reduce; 23/50, can't be reduced any further. so 23/50 is the fraction. 
7 0
3 years ago
Read 2 more answers
Write the equation of the line,in slope-intercept form, that has a slope of -2 and goes through the point (1,1)
kirza4 [7]

Answer:

The equation of the line would be y = -2x + 3

Step-by-step explanation:

In order to find the equation of the line, start by using point-slope form with the known information.

y - y1 = m(x -x1)

y - 1 = -2(x - 1)

Now that we have this, solve for y.

y - 1 = -2x + 2

y = -2x + 3

8 0
3 years ago
A penny is tossed 650 times and heads came up 200 times. What is the experimental probability of tossing tails?
liraira [26]
The probability of tossing tail would be 9/13
3 0
3 years ago
factorise the following 1. x²-2x+15.... 2. y²-19y+90​
Marta_Voda [28]

Answer:

1. x²-2x+15

This can't be factored, I've tried multiple ways now, but it just can't be factored.

2. y²-19y+90​

Let's factor y^2−19y+90

y^2−19y+90

The middle number is -19 and the last number is 90.

Factoring means we want something like

(y+_)(y+_)

Which numbers go in the blanks?

We need two numbers that...

   Add together to get -19

   Multiply together to get 90

Can you think of the two numbers?

Try -9 and -10:

   -9+-10 = -19

   -9*-10 = 90

Fill in the blanks in

(y+_)(y+_)

with -9 and -10 to get...

(y-9)(y-10)

Answer:

(y−9) (y−10)

3 0
3 years ago
Given the function f(x) =3(x+2)-4, solve for the inverse function when x=2
Usimov [2.4K]

The inverse function is f(x) = \frac{x + 4}{3} - 2, which makes the inverse at x = 2 equal to 0.


All inverse functions can be found by switching the x and f(x) values. Once that is done, solve for the new f(x) value. The result will be the inverse of the original function. The step-by-step process is below.


f(x) = 3(x + 2) - 4 ----> Switch the x and f(x)

x = 3(f(x) + 2) - 4 ----> Add 4 to both sides

x + 4 = 3(f(x) + 2) ----> Divide both sides by 3

\frac{x + 4}{3} = f(x) + 2 ----> Subtract 2 from both sides.

f(x) = \frac{x + 4}{3} - 2


The end is your inverse function. So then we can evaluate when x = 2.


f(x) = \frac{x + 4}{3} - 2

f(2) = \frac{2 + 4}{3} - 2

f(2) = \frac{6}{3} - 2

f(2) = 2 - 2

f(2) = 0

4 0
3 years ago
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