CANT GET WRONGKristen is wrapping presents for the holidays. She has a box that measures 4 ft. x 2 ft. x 2 ft. How many square feet of wrapping paper does she need to cover the box without overlapping?
A) 16 ft2
B) 40 ft2
C) 64 ft2
D) 96 cm2

Answers

Answer 1

Answer: we can either just mutiply them and add them
(area=legnth times width)
or we can use Surface Area formula (which can be found for only rectangular prisms)

SA=2(LW+LH+WH)

L=4
W=2
H=2
sub
SA=2(4*2+4*2+2*2)
SA=2(8+8+4)
SA=2(20)
SA=40

answer is 40 ft^2

aswer is B

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Bill can hammer 20 nails in 6 minutes. Jeff can do the same job in only 5 minutes . How long will it take them to finish if Bill hammers the first 5 nails, then Jeff hammers for 3 minutes then Bill finishes the job?A. 4.6 minutes
B. 5.0 minutes
C. 5.4 minutes
D. 5.8 minutes
E. 6.0 minutes

Answers

Bill hammers 20 nails in 6 minutes.
==> It takes him 6/20 = 0.3 minutes to hammer one nail.
==> If the total job is 20 nails, then he does 1/6 of the job in 1 minute.

Jeff hammers 20 nails in 5 minutes.
==> It takes him 5/20 = 0.25 minutes to hammer one nail.
==> If the total job is 20 nails, then he does 1/5 of the job in 1 minute.

Notice that the question doesn't say what size job they're assigned.
I'll assume it's a 20-nail job.

First step: Bill hammers 5 nails.
At 0.3 minutes per nail, that takes Bill 5 x 0.3 = 1.5 minutes

Second step: Jeff hammers for 3 minutes.
At 0.25 minute per nail, he adds 3/0.25 = 12 nails to Bill's 5, for a total of 17 so far.

Third step: Bill finishes the job.
There are (20 - 17) = 3 nails left to go.
At 0.3 minutes per nail, this takes Bill 3 x 0.3 = 0.9 minutes.

First step . . . . . 1.5 minutes
Second step . . . 3 minutes
Third step . . . . . 0.9 minutes
Total . . . . . . . . .5.4minutes

The product of two numbers is 1856. The sum is ninety. What is the difference of these two numbers?a. 30
b. 28
c. 26
d. 24

Answers

Answer: The correct options is

(c) 26.

Step-by-step explanation: Given that the product of two numbers is 1856 and their sum is 90.

We are to find the difference of the two numbers.

Let x and y represents the given numbers.

Then, according to the given information, we have

$xy=1856,\n\nx+y=90.$

We will be using the following formula :

$(a-b)^2=(a+b)^2-4ab.$

We have, for x and y,

$x-y\n\n=√((x+y)^2-4xy)\n\n=√(90^2-4*1856)\n\n=√(8100-7424)\n\n=√(676)\n\n=26.$

Thus, the required difference of the two numbers is 26.

Options (c) is CORRECT.

Answer is 26:

58 x 32 is 1856

58 + 32 is 90

and 58 - 32 is 26!

hope it helped!

Write the equation of the line that passes through (10,-3) and (-20,9) in slope intercept form

Answers

Answer:

$y=-(2)/(5)x+1$

Step-by-step explanation:

Write in slope-intercept form, y=mx+b.

Simplify each radical expression. Leave in radical form. Show your work

Answers

1. √45n^5 = √ 9 * √5 * √n^5 = 3 * n * n * √n * √5 = 3n^2√5n
2. √75 + √3 = √15 * √3 + √3 = √5 * √3 * √3 + √3 = 3√5 + √3
3. √7 (√14 + √3) = √7 * √14 + √7 * √3 = √7 * √7 * √2 + √7 * √3 = 7√2 + 7√3

I believe these are the solutions

Answer:

√45n^5
$√(45n) ^(5)$

There are 70 students in a school band. 40%are sixth graders,20% are seventh graders and the rest are eighth graders.How many sixth graders are there.

Answers

Answer:the number of sixth graders is 28

Step-by-step explanation:

Total number of students in the school band is 70. 40% are sixth graders. 20% are seventh graders and the rest are eighth graders. This means that the percentage of eighth graders is 100 - (40+20) = 100 - 60 = 40%

This means that the number of sixth graders would be 40% of the total number of students in the school band. It becomes

40/100 × 70 = 0.4×70 = 28

a school is buying jerseys for their baskett ball team that cost $35 each. how many jerseys were purchased if she school spent $560

Answers

Answer: 16

Step-by-step explanation:

560 divided by 35=16

560/35=16

16 jerseys would be purchased

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CANT GET WRONGKristen is wrapping presents for the holidays. She has a box that measures 4 ft. x 2 ft. x 2 ft. How many square feet of wrapping paper does she need to cover the box without overlapping? A) 16 ft2 B) 40 ft2 C) 64 ft2 D) 96 cm2

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CANT GET WRONGKristen is wrapping presents for the holidays. She has a box that measures 4 ft. x 2 ft. x 2 ft. How many square feet of wrapping paper does she need to cover the box without overlapping?
A) 16 ft2
B) 40 ft2
C) 64 ft2
D) 96 cm2