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Kipish [7]
3 years ago
8

Cheryl is taking an online test that gives her instant results. After answering 16 questions, the test revealed that 10 were ans

wered correctly. She
then answered I consecutive questions correctly and achieved her goal of 80% accuracy. Write an equation that can be used to determine
how many questions she answered correctly to reach her goal.


Help ;-;
Mathematics
2 answers:
Anna [14]3 years ago
4 0
Y=5(3/2)^x is this model exponential growth,decay or neither ?
Zigmanuir [339]3 years ago
3 0
It’s probably neither .
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If you have 10 red, 10 blue, 10 orange and 10 black socks in a drawer, how many socks must you pull out of the drawer (assume it
Orlov [11]

Answer:

Step-by-step explanation:

The probability of  u choosing two orange socks from the sock drawer WITHOUT REPLACEMENT:

= P(the first one is Orange) * P(the second one is Orange)

= 10/40 * 9/39 = 3/52.

6 0
3 years ago
Which expression is equivalent to −16y+13 ?
monitta

Answer:

None of them

Step-by-step explanation:

-16 y+13

16(−y+2)  = -16 +32

−16(−y+13) = 16y -208

−16(y+2)  = -16y -32

16(−y+13)= -16y+208

3 0
4 years ago
Read 2 more answers
PLEASEEEEEE help me!!!!! Will give brainliest!!!! Explain each step too in how u got ur answer.
Effectus [21]

Answer:

x= -6

Step-by-step explanation:

18=x+14+x+16

18=2x+30

-30     -30

-12=2x

divide 2

-6=x

8 0
3 years ago
at 7 p.m. the temperature is 72 degrees F at 10 p.m. it is 52 degrees find the average rate of change in temperature
mart [117]
We will assume that we have a function relating between the time and the temperature. Any point in this function can be expressed as (x,y) where x is the time and y is the temperature (any point is expressed as (time, temperature)).

We have two points given:
<span>At 7 p.m. the temperature is 72 degrees F: First point is (7,72)
</span><span>At 10 p.m. the temperature is 52 degrees F: Second point is (10,52)

The rate of change is simply the slope of this function, this slope can be calculated as:
rate of change = (y2-y1) / (x2-x2)
we have y2= 52, y1= 72, x2= 10 and x1= 7

Substituting in the equation, we can calculate the rate of change as follows:
rate of change = (52-72) / (10-7) = -6.667 degrees/hours
Note: The negative sign indicated a DECREASE in the temperature.</span>
4 0
4 years ago
10. Expand and Simplify (r+3) (r+11)=
mihalych1998 [28]

Answer:

r^2 + 14r + 33

Step-by-step explanation:

Apply the "FOIL" method for multiplying two binomials:

(r+3) (r+11) = r^2 (first terms) +

                    + 33 (last terms) +

                     + 11r (outer terms) +

                      + 3r (inner terms)

Combining ilke terms, we get:

r^2 + 14r + 33

6 0
3 years ago
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