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Shtirlitz [24]
3 years ago
8

A blackboard has an area of 28ft and a perimeter of 22 ft. What are the dimensions of the board?

Mathematics
2 answers:
DanielleElmas [232]3 years ago
7 0
Width and height their is no depth
Lunna [17]3 years ago
6 0
Hey there!

Area is multiplying the width and the length, so check what two numbers equal 28 . . .

4 x 7 =  28 (area)


4 + 4 = 8

7 + 7 = 14

8 + 14 = 22 (perimeter)

The dimensions are 4 by 7 ft.

Hope this helps you.
Have a great day!

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Is an apple juice box 250 milliliters or 250 liters
klasskru [66]

Answer:

Step-by-step explanation:

250 milliliters

6 0
3 years ago
Could I solve this inequality by completing the square? How would I do so?
sammy [17]

Answer:

\large\boxed{x>-2+\sqrt{14}\ \vee\ x

Step-by-step explanation:

x^2+4x>10\\\\x^2+2(x)(2)>10\qquad\text{add}\ 2^2=4\ \text{to both sides}\\\\x^2+2(x)(2)+2^2>10+4\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\(x+2)^2>14\Rightarrow x+2>\sqrt{14}\ \vee\ x+2-2+\sqrt{14}\ \vee\ x

8 0
3 years ago
woman has 7 coworkers' man. How many different possible groups of four people could do the project, if one out of three is women
aliina [53]

Answer: 24ways

Step-by-step explanation:

Given data:

No of men in the workplace = 7

No of women in the workplace = 1

How many ways can a group of 4 people carry out a project if on out of the 3 must be a woman.

Solution.

A group of 4 can carry out the project with one be a woman

This means there must be 3 males and 1 female in the group

= 4p3

= 24ways

The project can be carried out by 4 groups in 24 ways

6 0
3 years ago
Given that (- 2, 7) is on the graph of f(x) , find the corresponding point for the function f(x + 4).
AveGali [126]

Answer:

\boxed{\ the \ corresponding\  point\  is \ (-6,7)\ }

Step-by-step explanation:

We know that f(-2)=7

x+4 = -2 <=> x = -6

so f(-6+4) = f(-2)=7

then the corresponding point is (-6,7)

3 0
3 years ago
Factor:<br> 4b2 - 12b + 9
Vikentia [17]

Answer:

  (2b-3)²

Step-by-step explanation:

The square of a binomial is ...

  (p - q)² = p² - 2pq + q²

The fact that the first and last terms are perfect squares suggests that you might want to look to see if the middle term matches this form. It does.

For p² = 4b², p=2b.

For q² = 9, q = 3.

Then 2pq = 2(2b)(3) = 12b.

So, the factoring is ...

  4b² -12b +9 = (2b -3)²

5 0
4 years ago
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