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3 years ago

Timed test please help

Mathematics

1 answer:

insens350 [35]3 years ago

8 0

Last option: − ∞ < y < 5

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Does anyone know the answers to these blank questions?

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Answer:

h = 21

n = 60

p = 7

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2 years ago

Statement "if a and b are both positive integer numbers, then a +b > a

bezimeni [28]

Answer:

Always

Step-by-step explanation:

Subtracting a from both sides yields b>0, which is always true since b is a positive integer.

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1 year ago

Evaluate: xy+2x^2, if x=0.1 and y=9.8

shepuryov [24]

Answer: 1

Step-by-step explanation:

$(0.1)(9.8)+2(0.1)^2\\0.98+0.02=1$

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3 years ago

Read 2 more answers

Margot is sewing a ribbon on a seam along the perimeter of a square pillow. The side length of the pillow is 2x2 1 inches. She p

Sauron [17]

The expression used for the length of ribbon that she needs for both pillows will be $4(2x^{2} +4x-6)$ .

The total length of the pillow she needs will be 130 inches.

Given,

The side length of pillow is $(2x^2 + 1) \ inches$ .

The side length of another pillow is $4x-7 \ inches$ .

We know that perimeter of square will be,

$P=4\times length$

So the perimeter of pillow will be,

$P=4\times (2x^2+1)\\$

$P=8x^{2} +4$

Similarly, the perimeter of another pillow will be,

$P=4\times (4x-7)$ ]

$P=16x-28$

Hence,the total length of ribbon that she needs for both the pillows will be,

$8x^{2} +4+16x-28\\8x^{2} +16x-24\\4(2x^{2} +4x-6)$

If $x=3.5\\$ then the total length of ribbon will be,

$4(2\times 3.5^{2}+4\times 3.5-6)\\4(2\times 12.25+14-6)\\$

$4(24.5+8)$

$4\times 32.5\\$

$130 \ inches$ .

Thus the required expression will be $4(2x^{2} +4x-6)$ and the total length of ribbon she needs will be 130 inches.

So, the correct option will be (D).

For more details on perimeter of square follow the link:

brainly.com/question/5402168

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3 years ago

Sixteen boxes that are each 1 5/8 feet high are stacked. Find the height of the stack

kifflom [539]

Answer: 26
Explanation: 1 5/8 is equal to 13/8. 8/8 is equal to 1, and 8 plus 5 is 13. 13/8 is an improper fraction, but we will change that later. Since there are sixteen boxes, we must do 13/8 times 16, which is 208/8 if we do the math. 208 divided by 8 is 26.

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3 years ago