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ahrayia [7]
2 years ago
7

Evaluate and help me solve this

Mathematics
2 answers:
Setler79 [48]2 years ago
8 0

Answer:

Step-by-step explanation:

the expression equals 4

Korolek [52]2 years ago
6 0
The answer is 3/2 or 1.5

you substitute the variables with the numbers given and do the operations in the parenthesis first. then, subtract 5-2 and with that answer, you multiply it by your answer from the parenthesis

Your final answer will be 3/2
You might be interested in
Simplify square root of (1-cos)(1+cos)/cos^2
Pavel [41]
I hope this helps you



(1-cosx)(1+cosx)=1+cosx-cosx-cos²x=1-cos²x=sin²x


sin²x
____
cos²x


tg²x
3 0
2 years ago
F(x) = x^2 and g(x) = 2x-3 What is the value of g(4) + f(-3)?
Komok [63]

Answer: 66

Step-by-step explanation:see attachment.

If this helps you please rate brainest

3 0
3 years ago
Sandra's scores on the first 4 tests were 87%, 92%, 76%,and 89%. What is the minimum score she needs to make on the fifth test s
sergejj [24]

Answer:

Sandra need to score at least <u>56%</u> in her fifth test so that her average is 80%.

Step-by-step explanation:

Given:

First 4 test scores = 87%, 92%, 76%,89%

Average targeted = 80%

We need to find the minimum score she needs to make on fifth test to achieve average of at least 80%.

Solution:

Let the minimum score she needs to make in fifth test be 'x'.

Total number of test = 5

Now we know that;

Average is equal to sum of all the scores in the test divided by number of test.

framing in equation form we get;

\frac{87+92+76+89+x}{5}=80

Multiplying both side by 5 we get;

\frac{344+x}{5}\times 5=80\times 5\\\\344+x=400

Subtracting both side by 344 we get;

344+x-344=400-344\\\\x=56\%

Hence Sandra need to score at least <u>56%</u> in her fifth test so that her average is 80%.

5 0
3 years ago
Solve for x.<br> X +5<br> 4x + 15<br> x = [?]
Darina [25.2K]

Answer:

The answer is 70x

Step-by-step explanation:

simplify step-by-step.

x+54x+15x

Combine Like Terms:

=x+54x+15x

=(x+54x+15x)

=70x

Answer:

=70x

8 0
2 years ago
Ellie borrowed some money from her friend in order to help buy a new video game
sergey [27]

Answer:   L=90-10t

0-90

1-80

2-70

3-60

Step-by-step explanation:

that should be right lol

because it decreases by ten a week so just count down by ten each week. Then, you can make the equation 90-10t and if you substitute each week for t it is true.

90-10(0)=90-0=90

90-10(1)=90-10=80

and so on...

4 0
3 years ago
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