All categories

2 years ago

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

Mathematics

2 answers:

damaskus [11]2 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]2 years ago

5 0

Answer:

$21$

Step-by-step explanation:

<u /> $b^2-a$

$(5)^2-(4)$

$25-4$

$21$

Answer: $21$

You might be interested in

What are the zeros of the function <br> f(x)= x^2+7x−18?<br> <br> Enter your answers in the boxes.

olga55 [171]

The zeros of the function are x=2,-9

5 0

2 years ago

The equation

ra1l [238]

<h2>Explanation:</h2>

Let's use a trial and improvement method to find this solution.

Step 1. Let's choose x = 8.5

Substituting into the equation:

$(8.5)^2+ 3(8.5) - 94=0? \\ \\ 72.25+25.5-94=0? \\ \\ 3.75\neq 0$

Step 2. Let's choose x = 8.4

Substituting into the equation:

$(8.4)^2+ 3(8.4) - 94=0? \\ \\ 70.56+25.2-94=0? \\ \\ 1.76\neq 0$

Step 3. Let's choose x = 8.3

Substituting into the equation:

$(8.3)^2+ 3(8.3) - 94=0? \\ \\ 68.89+24.9-94=0? \\ \\ -0.21\neq 0$

Since the sign of the equation changes from positive to negative when evaluating from 8.4 to 8.3, then x = 8.3 seems to be a reasonable value. Finally, the solution to 1 decimal place is:

$x=8.3$

6 0

3 years ago

How are weather balloons and weather satellites similar?

Ymorist [56]

The answer is A. Both collect weather data.

Answer B is false, Balloons generally deconstruct, Satellites do not as they are meant to orbit way past the stratosphere.
Answer C is false, Only satellites can go past the exosphere.
D. Neither of them have any sort of impact on the weather.

7 0

3 years ago

Read 2 more answers

If ray sv is an angle bisector of angle rst. if measure of angle rsv is equal to (3x + 5)

Marina86 [1]

This question is unclear, I don't understand and it doesn't ask the question.

8 0

2 years ago

If a = -4, b = 2, C = 3, and d = -5, then what is the value of (a - b)2 + (c- d)2

leva [86]

Answer:

100