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Arte-miy333 [17]
3 years ago
6

Cooper is taking a multiple choice test with a total of 80 points available. Each question is worth exactly 4 points. What would

be Cooper's test score (out of 80) if he got 2 questions wrong? What would be his score if he got xx questions wrong?
Mathematics
1 answer:
VLD [36.1K]3 years ago
3 0

Answer:

80-4(2)=72; 80-4(x) if he got x wrong.

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The sum of a number and five times its reciprocal is 4.5. Write a quadratic equation for the number, and use the quadratic formu
g100num [7]

Answer:

x= -2 and (x+3)=0, x= -3

Step-by-step explanation:

"The sum of a number" well we do not know what the number is right, so let's call the number x. So we know we have x and we are adding it to something because it says sum. What are we adding it to? "5 times its reciprocal". A reciprocal of a number is equal to 1/the number. So the reciprocal of x is just 1/x. But we want 5 times this so multiply by 5. So now we have x + 5(1/x). Now we need to set it equal to something to be able to solve it. The problem says the sum of a number and 5 times its reciprocal is -6, so x + 5(1/x) = -6. Now just use order of operations to solve for x. First multiply: x + 5/x =-6. Then the next stperfect is harder because we want to get x by itself but we have x + 5/x. A trick you can do here is multiply the whole equation by x. This cancels out the fraction for us: x(x + 5/x) = -6(x) becomes x^2 +5 = -6x. Now we have a quadratic equation, to solve this you have to Factor or use the quadratic formula. I'll try factoring: first we need all of the terms on one side: x^2 +5x +6 =0. Now we need factors of 6 that add or subtract to 5. There are a couple of options here we could use 6 and -1 or 2 and 3. 6 and -1 would not work because both signs in the equation are plus which means we need our factors to both be positive, also if you tried 6 and -1 and then foiled out the factors to check it, it would not work. So 2 and 3 have to be the factors so the equations equals (x+2)(x+3)=0. Now we set each factor equal to zero and solve for x: (x+2)=0, x= -2 and (x+3)=0, x= -3. Those are the two numbers that would work! Hope this helps!!

5 0
3 years ago
Read 2 more answers
What is the growth factor for y=4^x
tester [92]
Since 4>1, this represents exponential growth.
5 0
3 years ago
Jamal states that ax + b = a(x + c), given a, b, and c are not equal to 0. What must be the value of c for Jamal's statement to
Anna35 [415]

ANSWER

For Jamal statement to be true,

c = \frac{b}{a}

EXPLANATION

The given statement is:

ax + b = a(x + c)

We expand the left hand side to obtain,

ax + b = ax + ac

Subtract ax from from both sides of the equation.

b=ac

We know that, a≠0 , so we can divide through by 'a'.

\frac{b}{a}  = c

6 0
4 years ago
Jasmine wants to use her savings of $1128 to buy video games and music CDs. The total price of the music CDs she bought was $72.
Jlenok [28]
The maximum # of video games Jasmine can buy is 24.
1128-72=1056
1056/43=24.55
simplified is 24
4 0
3 years ago
I’ll mark you brilliant!!!!!!!Iftheequationofalineis2x+y=6,whatistheslope?
Nonamiya [84]

Answer:

answer below

Step-by-step explanation:

2. The slope is 4

3. The slope is 3.

4. the slope is 14.

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