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Lana71 [14]
3 years ago
14

Which of the following are reasonable answers for the product of two negative numbers and a positive number? Select all that app

ly.
-15
45
20
-40
Mathematics
1 answer:
Naddika [18.5K]3 years ago
8 0

A product is the solution to multiplication.

When two negative numbers are multiplied, a positive number is the product.

Example: -5 * -10 = 50


When a negative and a positive number are multiplied, a negative number is the product.

Example: -9 * 3 = -27


-15 and -40 are the best answers.

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A square has a perimeter of 12x + 52 units. Which expression represents the side length of the square in units?
DochEvi [55]
1. Find the surface area of the rectangular prism. (1 point) 
<span>Measures are 2, 3, and 4 inches. Let W=2, L=3, H=4 </span>
<span>a rectangular has six sides, the total surface area is equal to 6 plains: </span>
<span>2*W*L + 2*L*H + 2*L*W </span>
<span>= 2*(W*L + L*H + L*W) </span>
<span>= 2 * (2*3 + 3*4 + 4*2) </span>
<span>= 2 * ( 6 + 12 + 8 ) </span>
<span>= 2 * 26 </span>
<span>= 52 ................... the last choice </span>

<span>2. A cube has a side length of x feet. Which expression represents the surface area of the cube? (1 point) </span>

<span>Area of one face = x^2, Total Area of 6 faces = 6*x^2 = 2x^2 units </span>


<span>3. Find the surface area of the cylinder. Use 3.14 for pi . (1 point) </span>
<span>Length: 15 cm, Diameter: 2 cm </span>
<span>A cylinder has 3 surfaces: two circles + one curved surface area </span>
<span>...... two circles of 2cm diameter (1cm radius) </span>
<span>A = pi*r^2 = 3.14*1*1 = 3.14 sq. cm ...... two circles' area = 6.28 sq.cm </span>
<span>Curved surface area = circumference * length </span>
<span>.... circumference = pi*d = 3.14 * 2 = 6.28 cm ......... length = 15 </span>
<span>curved surface area = 6.28*15 = 94.2 sq. cm </span>

<span>Add both for total surface area = 6.28 + 94.2 = 100.48 sq.cm </span>


<span>4. The bottom of a shopping bag measures 8 inches by 10 inches. The bag has a height of 12 inches. How much paper is needed to make the bag? (1 point) </span>
<span>two pieces of paper ... one for bottom = 8*10 = 80 sq.in </span>
<span>the other ... height * perimeter of the bottom = 12*(2*(10+8)) = 12 * 2 * 18 = 432 sq.in </span>
<span>Add both: 80 + 432 = 512 sq.in <<<<<<<<<<<</span>
4 0
3 years ago
Read 2 more answers
R + 74 = R - 74 is true for:<br><br> Please solve for R
Alinara [238K]

Answer:

No solution

Step-by-step explanation:

Because ;

R+74=R-74

R-R=-74-74 —> 0= -148

Or R-R=74+74 —> 0=148

I hope I helped you^_^

7 0
2 years ago
What’s the solutions for -3x-245-36
sergey [27]
The answer is -3x-281
7 0
3 years ago
An angle measures 30 degrees.
scZoUnD [109]
Complimentary angels are angels that together add up to 90 degrees.

To find the measure of an angles compliment, simply subtract the degree you are given from 90.

90 degrees - 30 degrees = 60 degrees.

Hope this helps! :)

8 0
3 years ago
Help with the picture
True [87]

Answer:

The first question is 9.

The second is 36.

The third is 8 1/2

Step-by-step explanation:

For the first one, there are 8 cubes plus the two halves, which equal 1 so 8 plus 1 equals 9.

The second one is 9 divided by a quarter which is 1/4, 9 divided by 1/4 equals 36.

For the third, length times witdth times height equals volume. So then (you don’t have to do it in order but) 2 times 1 times 4 1/4 equals 8 1/2.

4 0
3 years ago
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