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Likurg_2 [28]
4 years ago
15

Given f(x) = -1/2x + 7, find x when f(x) = 10.

Mathematics
2 answers:
levacccp [35]4 years ago
5 0

Step-by-step explanation:

f(x) =  -  \frac{1}{2} x + 7 \\  \\ when \: f(x) = 10 \\  \\ \therefore \:  10 =  -  \frac{1}{2} x + 7  \\  \therefore \: \frac{1}{2} x  = 7 - 10 \\  \\ \therefore \: \frac{1}{2} x  =  - 3 \\  \\ \therefore \: x =  - 3 \times 2 \\  \\  \huge \purple  {\boxed{\therefore \: x =  - 6}}

n200080 [17]4 years ago
3 0

Answer:

An employee receives a bonus for x amount. After deducting 30% for taxes, the employee nets $500. To the nearest dollar, what is the amount of the bonus?

Step-by-step explanation:

whats the answer pls tell me

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What additional information do you need to prove △ABC ≅ △DEF by the SSS Postulate?
Fudgin [204]
The answer to this question is answer choice C.

For the SSS postulate, we need 3 pairs of congruent sides. However, in the image, there are only 2 pairs. 

The missing pair in the image is AC and DF. If those are congruent, the triangle can be proven congruent by the SSS postulate.

Hope this helps! :)

~AgentCozmo4, Junior Moderator
7 0
4 years ago
Read 2 more answers
25% of 72 is 18. 18+72=90. I this true or false?
ra1l [238]

Answer:

yes!

Step-by-step explanation:

8 0
4 years ago
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Evaluate the expression 4(n+3) - 5r for n = 1/5 and r= 1/5.​
myrzilka [38]

Answer:

59/5 or 11.8

Step-by-step explanation:

4(1/5+3)-5(1/5)

4(1/5+3)-5(1/5)

-> 59/5, 11.8

3 0
3 years ago
Four friends were born in consecutive years. The sum of their ages is 94. What is the age of the oldest friend?
Savatey [412]
Hello,

We don't need algebra to solve this.

I suppose the ages are 1,2,3,4
Their sum is 1+2+3+4=10.
To obtain 94 we must add 94-10=84 for 4 persons =>84/4=21 to each

Ages are
1+21=22
2+21=23
3+21=24
4+21=25

But if really want an algebric resolution:

Let's x the age of the youngest
x+1,x+2,x+3 the others.

x+(x+1)+(x+2)+(x+3)=94
==>4x+6=94
==>4x=88
==>x=22
Ages are 22,23,24,25.

The oldest friend is 25 years old.

8 0
3 years ago
Read 2 more answers
Solve 5x2 = −30x − 65
Crank
I hope this helps you




5x^2+30x+65=0




5 (x^2+6x+13)=0



x^2+6x+13=0



a=1 b=6 c=13



disctirminant=b^-4ac



disctirminant=6^2-4.1.13



disctirminant=36-52



disctirminant= -16


x1= -6+square root of -16/2.1



x1= -6+4i/2=2i-3



x2= -6- square root of -16/2.1



x2= -6-4i/2= -3-2i
6 0
3 years ago
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