A blackboard has an area of 28 ft2 and a perimeter of 22 ft. What are the dimensions of the board?

2 ft by 11 ft
2 ft by 14 ft
4 ft by 7 ft
7 ft by 7 ft

Answers

Answer 1

Answer:

Step-by-step explanation:

A=LW, L=A/W

P=2(L+W), using L=A/W we get

P=2(A/W+W)

P=2(A+W^2)/W

PW=2A+2W^2

2W^2-PW+2A=0, given A=28 and P=22 we have

2W^2-22W+56=0

2(W^2-11W+28)=0

2(W-7)(W-4)=0

So the dimensions are 4ft by 7ft

Answer 2

Answer:

C is the right answer

Step-by-step explanation:

i got it right on the quiz


Related Questions

Which number is a multiple of 4?
A. 26
B. 32
C. 14
D. 22

Answers

Answer:

B) 32

Step-by-step explanation:

8 x 4 = 32

An equation is shown below: 4(x − 3) − 5(x + 1) = 3 Which statement shows a correct next step in solving the equation? (1 point) The equation can become 4x − 12 − 5x − 5 = 3 by applying the associative property of multiplication. The equation can become 4x − 3 − 5x + 1 = 3 by applying the associative property of multiplication. The equation can become 4x − 3 − 5x + 1 = 3 by applying the distributive property. The equation can become 4x − 12 − 5x − 5 = 3 by applying the distributive property.

Answers

Answer:

The equation can become 4x − 12 − 5x − 5 = 3 by applying the distributive property.

Find the surface area of the shape below. Answer in NUMBERS only, NO units.

Answers

Answer:

solo tienes que meterte el dedo por el culo y ya

Answer:

150 cm^2

Step-by-step explanation:

A=2(wl+hl+hw)

A =2(5*5+5*5+5*5)

A=2(25+25+25)

A=2(75)

A=150

Need help with 14!!! Please show ur work.My teacher is a Karen soooo yeah! Have a nice day

Answers

Answer:

A) 24 miles

Step-by-step explanation:

15/2.5 = 6 miles per inch

(6)(4) = 24 miles

2.5 inches is 15 miles so if it’s 4 inches on the map it would be 27 miles cuz each half inch is 3 miles. 3x9=27

if you answer this correctly, i’ll give you brainliest!
-
-
find the value of x to make the following expression true:

6x = 216

Answers

Answer:

Original equation: 6x=216

Divide by 6: x=36

Let me know if this helps!

Answer:

If 216 = 6x then x = 216/6

216/6 = 36

x = 36

Step-by-step explanation:

The ratio f sugar to flour in a cake recipe is 3 to 5. Marcus s going to follow the recipe to make a large sheetcake. He starts by putting 12 cups of sugar in a mixing bowl. How many cups of flour should he add?

Answers

He should add 20 cups of flower

Which of the following are solutions to the equation below?
Check all that apply
x-2x - 24=0
A -6
B-24
C 4
D 6
E. -4

Answers

The answer of the equation is b-24

Help for brainliest

Answers

Answer:

Rotation of 180 degrees, either direction

Dilation, making it smaller by some factor(we aren't given measurements so we cannot be exact)

Then move the figure to the right and then move the figure up

Step-by-step explanation:

Taco Bell had 60 orders. 60% were tacos and 40% were burritos. How many tacos is that?

Answers

Answer:

60% of 60 is 36. The answer should be 36

Step-by-step explanation:

60 / 100 * 60

0.6 * 60

36

Just divide the number by 100 and multiply it by the percentage.

Mark me as brainliest if you want to.

Each peanut butter snack costs $2. Each chocolate snack costs $3. How much does it cost to buy 6 peanut butter snacks and 8 chocolate snacks? Write an equation.

Answers

Answer:

36

Step-by-step explanation:

8x3 is 24

6x2 is 12

when you add those together you get 36

Answer:

2 dollars x 6 Peanut butter snacks= 12 total

3 dollars x 8 chocolate= 24 total

24+12= 36 for the total all together

Step-by-step explanation:

You are buying 6 peanut butter snacks and they are $2 each so you multiply those numbers together for the total of Peanut butter snacks. You are also buying 8 things of chocolate and they are $3 each multiply them together you get the total for the chocolate. if you need the total for all together you add the totals together and you have your over all answer.

A college student takes the same number of credits each semester. Before beginning college, the student had some credits
earned while in high school. After 2 semesters, the student had 34 credits, and after 4 semesters, the student had 58
credits.

Answers

Answer:

The student gets 12 credits per semester, and started college with 10 credits that he earned in high school.

Step-by-step explanation:

Given that a college student takes the same number of credits each semester, and that before beginning college, the student had some credits earned while in high school, while after 2 semesters, the student had 34 credits, and after 4 semesters, the student had 58

credits, to determine how many credits she obtains each semester and how many credits she had at the beginning of college, the following calculation must be performed:

(58 - 34) / 2 = X

24/2 = X

12 = X

34 - 12 x 2 = X

34 - 24 = X

10 = X

Thus, the student gets 12 credits per semester, and started college with 10 credits that he earned in high school.

Answer:

C(t) = 12t + 10

Step-by-step explanation:

We're given two data points, (2,34) and (4,58). We want to find an equation of the form C(t)=mt+b where m is the rate of change and b is the y-intercept.

First, we find the rate of change.

m=(58−34)/(4−2)

m=24/2

m=12

This rate of change means that the student earns 12 credits each semester.

Finally, we need to solve the equation C(t)=12t+b for b, or the y-intercept. We do this by plugging in one of our data points. We'll use (2,34).

C(t)=12t+b

34=12(2)+b

b=34−24

b=10

This y-intercept means that the student earned 10 credits in high school.

Now that we've found m and b based on the given data, we find that the equation is C(t)=12t+10.

Choose the expression that best represents the product of the width and the height

Answers

The length of a rectangle is 12 inches more than its width. What is the width of the rectangle if the perimeter is 42 inches?

x best represents .

x + 12 best represents

Pls help (5th grade)

Answers

Answer: 4.523

Here is an image that might help you understand placements.

Answer:

rounded to the nearest thousandth would be 4.523

Why do heavier things have more kinetic energy?

Answers

Answer:

hi have a good day :3

Step-by-step explanation:

There are 350 students at a middle school dance, where ratio of 7th graders to 8th graders is 3:4 how many of the students at the dance are 8th graders?

Answers

Answer:

150 7th Graders and 200 8th graders

Step-by-step explanation:

Basically, add the parts of the ratio together and create 7. Then, to find out how much 1 part is equal to, divide the amount of students by the number of parts - so it would be like 350/7 = 50.

So now you know that 1 part is equal to 50 students. From here, you can multiply the two amounts of parts by 50.

3 x 50 = 150 7th Graders

4 x 50 = 200 8th Graders

Which of the following is equivalent?

Answers

Answer:

0.4

Step-by-step explanation:

Yeetyettyeteheheyehe

write each ratio in the simplest form:
12 feet to 9 yards​

Answers

Answer:

9 ft 3.00 yd

Step-by-step explanation:

Answer:

4:3

Step-by-step explanation:

divide 12 by 3 to get 4 and dive 9 by 3 to get 3


Tim says that if P is an odd number and Q is an even number
then P + Q -3 cannot be a prime number,
Which of the statements below shows that Tim is wrong?
A 7+2-3 = 6
B 49-3 = 10
C 4+1-3-2
D 1+4-32

HELP WILL MARK BRAINLIEST ​

Answers

Answer:

D

Step-by-step explanation:

since p is an odd number choice C can't be the answer because 4 is even number

Q is an even number so that choice B can't be answers because 3 is an odd number .

and for A 6 isnot a prime number so that it proves tim is correct.

but when we see D 2 is a prime number so that it shows tim is wrong.

The point P(0,-2) lies on the curve with equation y=f(x). Find the image of P on the curve with equation y=f(x)-1

Answers

Answer:

The image of P on the curve is (0,-3).

Step-by-step explanation:

On the curve with equation y=f(x)-1

On this curve, the output is subtracted by 1 from the original function.

The point P(0,-2) lies on the curve with equation y=f(x).

Input: 0, output: -2

-2 -1 = -3

So

The image of P on the curve is (0,-3).

help for brailest need help foe a grade

Answers

Answer:

1 4/9

Step-by-step explanation:

yw

Express 2431 in simplest radical form.

Answers

Answer:

I am expecting that 24.31 I am guessing

24.31 is the correct answer i checked if not then it’s 24.32

A probability experiment is conducted in which the sample space of the experiment is S={8,9,10,11,12,13,14,15,16,17,18,19}, event E={10,11,12,13}, and event G={16,17,18,19}. Assume that each outcome is equally likely. List the outcomes in F or G. Find P(F or G) by counting the number of outcomes in F or G. Determine P(F or G) using the general addition rule.

Answers

Answer:

i

Step-by-step explanation:

i

While abroad in Cairo, Egypt, you want to visit three other cities: Damanhur, Alexandria, and Suez. The following table details the costs of traveling to and from each city. All costs are given in Egyptian pounds (EGP).

Origin and Destination
Cost (EGP)
Cairo to Damanhur
153
Cairo to Alexandria
171
Cairo to Suez
130
Damanhur to Cairo
143
Damanhur to Alexandria
174
Damanhur to Suez
182
Alexandria to Cairo
167
Alexandria to Damanhur
192
Alexandria to Suez
144
Suez to Cairo
133
Suez to Damanhur
156
Suez to Aledandria
156

What is the cost of the most efficient route? You may visit the cities in any order, but you must begin and end in Cairo.
a.
EGP 589
b.
EGP 604
c.
EGP 614
d.
EGP 621

Answers

The answer is B) EGP 604

Answer:

b

Step-by-step explanation:

HELP HELP HELP HELP HELP HELP HELP

Answers

Answer:

Hi,

In a square, all sides are equal.

The area is obtained by multiplying one side by another side.

So, A = L^2

A = Area

L = length of a side

24ft^2 = L^2

L = square root(24) = 4.9

L = 4.9

We can say x^2 = 24

And the length of one side is therefore 4.9

At Davis's Hat Store around the block, they have a total of 300 hats in the store. 14% of the hats are white.
How many of the hats in the store are white?

Answers

Answer:

42.

Step-by-step explanation:

14% of 300 is 42.

hope this helped

help me please. need it asap ​

Answers

Answer:

X=-1

Y=-8

hope this helps!

Step-by-step explanation:

If sin(2x) = cos(x + 30"), what is the value of x?
20°
30°
500
1100

Answers

Answer:

2x=(x+30)

2x+x=30

3x=30

x=30÷3

x=10

Answer:

is 30

Step-by-step explanation:

2x=x+30

substract x

x=30

A six-sided number cube has one number, from 1 through 6, on each face. Number cubes are often used when playing board games 6 o CL​

Answers

Answer:

what is the question? there is no question to answer

Step-by-step explanation:

estimate the answer by rounding the divisor to the nearest whole number
198,600÷4.077​

Answers

Answer:

49,650

Step-by-step explanation:

Divisor is 4.077. So, if you round that number to 4 and divide 198,600 by 4, you get 49,650.

4.40
.63
4.79
.13
2.07
.77
9.28
.47
6.93
.20

Answers

Answer:

can you do elaborate more please?

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