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3 years ago

What is the surface area of this rectangular prism

Mathematics

1 answer:

Marina CMI [18]3 years ago

5 0

Answer:

C. $490 \textrm{ units}^{2}$

Step-by-step explanation:

The formula for surface area is

LA + 2B

LA indicated Lateral Area and can be found multiplying perimeter of base by the height.

7 + 7 + 14 + 14 = 42 * 7 = 294

Multiply the LA from above with the area of base times 2.

98 * 2 = 196

294 + 196 = 490, so the surface area of the rectangular prism is 490 units.

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8 + 3 + 2a = -1 + 3a + 4

otez555 [7]

Answer:

a = 8

Step-by-step explanation:

8 + 3 + 1 - 4 = 3a - 2a

8 = a

a = 8

I hope this helps a little bit.

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2 years ago

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Select the answer with the correct number of significant figures for each calculation. (6.022 × 10^23) × 2.58 = 1.55 × 10^24 1.5

maxonik [38]

Answer:

1.55 × 10^24

Step-by-step explanation:

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3 years ago

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Peony mixes red paint and white paint in the ratio 1:3 She uses four tins of red paint Work out the total number of tins of pain

blsea [12.9K]

Answer:

Step-by-step explanation:

4x3=12 tins of white paint

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3 years ago

What number added to heather equal 3 and multiply together to get -48

andrew-mc [135]

Answer: 3, 4, -4

If you multiply those 3, it equals -48. When you add them together, it's 3.

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3 years ago

Solve the system of eqautions <br> y=x2-5x+7 , y=2x+1

IgorC [24]

Answer:

Step-by-step explanation:

The system of equations is given as

y=x^2-5x+7 - - - - - - - - - - 1

y=2x+1 - - - - - - - - - - - - - - 2

We would equate equation 1 to equation 2, it becomes

x^2-5x+7 = 2x+1

x^2-5x+7- 2x - 1 = 0

x^2 - 5x - 2x + 7 - 1 = 0

x^2 - 7x + 6 = 0

We would use the factorization method of solving quadratic equations.

x^2 - 6x - x + 6 = 0

x(x - 6) - 1(x - 6)

(x - 6)(x - 1) = 0

x - 6 = 0 or x - 1 = 0

x = 6 or x = 1

Substituting both values of x into equation 2, it becomes

For x = 6,

y=2×6 + 1 = 12 + 1 = 13

y = 13

For x = 1,

y=2 × 1 +1 = 2 + 1 = 3

y = 3

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2 years ago