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3 years ago

A gift box is a rectangular prism. The box measures 12 in by 14 in by 7 in.

2 answers:

6 0

SA = 2hl + 2lw + 2hw
SA = 2(3)8) + 2(8)(10) + 2(3)(10)
SA = 48 + 160 + 60
SA = 268 in2

Someone helped me with this question once and this is what I got I hope this helps

Olin [163]3 years ago

4 0

Answer:

1176

Step-by-step explanation:

12 times 7 equals 84.84 times 14 is 1176

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Complete the square to factor X^2 +10X=-8

ella [17]

Answer: $x=\sqrt{17}-5$ and $x = -\sqrt{17}-5$

Step-by-step explanation:

Alright, lets get started.

The given equation is :

$x^{2} +10x = -8$

Adding 8 in both sides, it will become

$x^{2} +10x + 8 = -8 +8$

$x^{2} +10x + 8 = 0$

To make it perfect square, we need to add 25 and subtract 25

$x^{2} +10x + 8 +25-25= 0$

$x^2+10x+25+8-25=0$

$(x+5)^2+8-25=0$

$(x+5)^2-17=0$

Adding 17 in both sides

$(x+5)^2=17$

taking square root

$x+5=\sqrt{17}$

So,

$x=\sqrt{17}-5$ and $x = -\sqrt{17}-5$ .. Answer

Hope it will help :)

7 0

3 years ago

Read 2 more answers

Please help asap I needs someone to find the addition property added

erik [133]

Step-by-step explanation:

you can notice that at step 2 9 is added on both sides that is the addition property of equality

8 0

2 years ago

A parallelogram has an area of 37. 72 m² and a height of 4. 6 m. How long is the base of the parallelogram? Enter your answer as

antiseptic1488 [7]

Answer:

8.2 m

Step-by-step explanation:

Divide 37.72 (area) by 4.6 (height) to find the base. H x b = A

6 0

2 years ago

What is the distance of P(1,-3) from y- axis

madam [21]

Answer:

1 unit to the right

Step-by-step explanation:

The y-axis is the vertical line and the point (1,-3) is one unit to the right of the vertical line

3 0

3 years ago

SAT scores are normally distributed with a mean of 1,500 and a standard deviation of 300. An administrator at a college is inter

Rama09 [41]

Answer:

The administrator should sample 968 students.

Step-by-step explanation:

We have to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.88}{2} = 0.06$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a p-value of $1 - 0.06 = 0.94$ , so Z = 1.555.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Standard deviation of 300.

This means that $n = 300$

If the administrator would like to limit the margin of error of the 88% confidence interval to 15 points, how many students should the administrator sample?

This is n for which M = 15. So

$M = z\frac{\sigma}{\sqrt{n}}$

$15 = 1.555\frac{300}{\sqrt{n}}$