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ollegr [7]
3 years ago
11

Find the value of the expression. b2 − a for a = 4 and b = 5

Mathematics
2 answers:
damaskus [11]3 years ago
8 0

Answer: 21

Step-by-step explanation: To solve this problem we will substitute b to equal 5 and a to equal 4.

b2 - a

Plug in the values for b and a

5^2 - 4    (Solve 5^2 5 x 5 = 25)

25 - 4 (Subtract)

21 is the value of the expression.

Serjik [45]3 years ago
5 0

Answer:

21

Step-by-step explanation:

<u>Step 1:  Set a to 4 and b to 5</u>

<u />b^2-a

(5)^2-(4)

25-4

21

Answer:  21

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What does -6(-7 - 3k)
Zina [86]
Here, Just apply Distributive property which tells, a(b + c) = ab + bc
So, -6(-7 - 3k) = 42 + 18k

In short, Your Answer would be 42 +18k

Hope this helps!
4 0
3 years ago
Solve the equation x + 0.7 = 1 - 0.2x in two different ways.Then check your answer.Show your work!
expeople1 [14]
Simplifying
x + 0.7 = 1 + -0.2x

Reorder the terms:
0.7 + x = 1 + -0.2x

Solving
0.7 + x = 1 + -0.2x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '0.2x' to each side of the equation.
0.7 + x + 0.2x = 1 + -0.2x + 0.2x

Combine like terms: x + 0.2x = 1.2x
0.7 + 1.2x = 1 + -0.2x + 0.2x

Combine like terms: -0.2x + 0.2x = 0.0
0.7 + 1.2x = 1 + 0.0
0.7 + 1.2x = 1

Add '-0.7' to each side of the equation.
0.7 + -0.7 + 1.2x = 1 + -0.7

Combine like terms: 0.7 + -0.7 = 0.0
0.0 + 1.2x = 1 + -0.7
1.2x = 1 + -0.7

Combine like terms: 1 + -0.7 = 0.3
1.2x = 0.3

Divide each side by '1.2'.
x = 0.25

Simplifying
x = 0.25

I only know 1 way.
6 0
4 years ago
Waht is this plz help ​
Nata [24]

Answer:

The answer is 10 and 37 degrees.

Step-by-step explanation:

Triangle angles add up to 180.

I hope this helped and if it did I would appreciate it if you marked me Brainliest. thank you and have a nice day!

5 0
3 years ago
The cost of tuition is a very important topic. The Alligator surveyed 500 randomly selected students and asked them if they supp
Veronika [31]

Answer:

Survey

Step-by-step explanation: A survey is a research method of collecting data from a particular target group through questions aimed at extracting specific information from them

6 0
3 years ago
Please help, I will give brainliest, I am struggling badly.
Valentin [98]

Answer:

C

Step-by-step explanation:

A line with a slope of 1/3 using the y=mx+b line slope equation would be:

y=1/3x+b

We can now plug the x and y values into this equation with x being -6 and y being 2.

2=1/3 * -6 +b

2= -2 +b

b=4

Therefore the equation is

y=1/3x+4

C

<em>I hope this helps! :)</em>

8 0
3 years ago
Read 2 more answers
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