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3 years ago

Help me I don’t understand how to do this

Mathematics

2 answers:

11Alexandr11 [23.1K]3 years ago

5 0

Answer: 119.28

Step-by-step explanation:

the formula for surface area of a rectangular prism is 2(width×length+height×length+height×width)

in this case, it would be 2×(2.1×8.4+4×8.4+4×2.1)=119.28

Zigmanuir [339]3 years ago

3 0

I think the answer to this question is 29

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Find the equation of the axis of symmetry for the parabola y = x2 + 2x − 9

Artemon [7]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

6.15 divided by 31 rounded

nikdorinn [45]

It would be (rounded) 5
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3 years ago

Please Help ASAP with Math

vampirchik [111]

Answer:

5.33

Step-by-step explanation:

move the 4 out of the summation because just a constant multiplier

4 *sum from 1 to 10 for (1/4)^(n-1) [sorry i don't know how to write sums using latex)

The formula for the geometric sum is :

First term*(1-multiplier^n)/(1-multiplier), formally $\frac{a_1(1-r^n)}{1-r}$

Here multiplier is 1/4

First term is (1/4)^(1-1) = 1

Thus the value of sum is $1*(1-(1/4)^1^0)/(1-1/4)$ which equals $(1- (1/4)^1^0)*4/3$

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2 years ago

How do you solve 6(x-3)+10=2(4x-5) step by step

kipiarov [429]

Answer:

x = 1

Step-by-step explanation:

1. Expand.

6x − 18 + 10 = 8x − 10

2. Simplify 6x − 18 + 10 to 6x − 8.

6x − 8 = 8x − 10

3. Subtract 6x from both sides.

−8 = 8x − 10 − 6x

4. Simplify 8x − 10 − 6x to 2x − 10.

−8 = 2x − 10

5. Add 10 to both sides.

−8 + 10 = 2x

6. Simplify −8 + 10 to 2.

2 = 2x

7. Divide both sides by 2.

1 = x

8. Switch sides.

x = 1

5 0

3 years ago