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san4es73 [151]
4 years ago
14

Given g(x) = -x – 5, find g(5).

Mathematics
1 answer:
dimulka [17.4K]4 years ago
8 0
Answer is -10

Work: -(5+5)
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An exam worth 388 points contains 65 questions. Some questions are worth 4 points and the others are worth 8 points. How many 4
BaLLatris [955]

Answer:

33 questions.

Step-by-step explanation:

Let x = 4 points questions.

Let y = 8 points questions.

<em>Translating the word problem into an algebraic equation;</em>

For the total number of questions;

x + y = 65 .........equation 1

For the total number of points;

4x + 8y = 388 ..........equation 2

<u>Given the following data;</u>

Total number of questions = 65

Total number of points = 333

<em>Solving the linear equation by using the substitution method;</em>

<em>Making x the subject in equation 1:</em>

x = 65 - y .......equation 3

<em>Substituting "x" into equation 2;</em>

4(65 - y) + 8y = 388

<em>Simplifying the equation, we have;</em>

260 - 4y + 8y = 388

260 + 4y = 388

<em>Rearranging the equation, we have;</em>

4y = 388 - 260

4y = 128

y = \frac {128}{4}

y = 32 (For the 8 points question).

<em>Substituting "y" into equation 3;</em>

x = 65 - 32

x = 33 (For the 4 points question).

<em>Therefore, the number of 4 point questions on the test are 33 questions. </em>

8 0
3 years ago
What is 7x plus 3x plus5
Makovka662 [10]
10x + 5
Or 5(2x  + 1)

Hope this helps!! Let me know if you have ANY questions.
6 0
3 years ago
Read 2 more answers
I need help for all three! Thank you!
mel-nik [20]

Answer:

3a. 0.415

b. 18.75

Step-by-step explanation:

3a. 2.49/6

=0.415

b. 150/8

=18.75

5 0
3 years ago
Solve for all values of x by factoring.<br> X^2 +2x-36=2x
steposvetlana [31]

Answer: 26 and 2

Step-by-step explanation: because it makes sense

4 0
3 years ago
A veterinarian needs to know an animal's weight in kilograms. If 20 pounds is about 9 kilograms and a dog weighs 30 pounds, use
Gnesinka [82]
The answer is 18 im pretty sure
3 0
4 years ago
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