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3 years ago

Which number sentences show ways to solve the problem?

Mathematics

1 answer:

Shalnov [3]3 years ago

5 0

Answer:

The answer to your question is letter c and d.

Step-by-step explanation:

A. 15 × 9 = 135 and 135 – 75 = 60 This answer is not correct because it is not necessary to multiply the # members by the cost of each tree, the answer is incorrect.

B. 3 × 15 = 45 and 45 + 15 = 60 This answer is incorrect because it's using a number 3 that is not part of the data.

C. 45 ÷ 9 = 5 and 5 × 15 = 75 . This answer is correct, first finds the number of tree bought by each member and after that multiply it by the cost of each tree.

D. 45 × 15 = 675 and 675 ÷ 9 = 75 This answer is correct, first found the total cost and after divide it by the number of members.

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What s the factor of (x+3)(x+2)

Virty [35]

<span>Simplifying (x + 3)(x + 2)

Reorder the terms: (3 + x)(x + 2)

Reorder the terms: (3 + x)(2 + x)

Multiply (3 + x) * (2 + x) (3(2 + x) + x(2 + x)) ((2 * 3 + x * 3) + x(2 + x)) ((6 + 3x) + x(2 + x)) (6 + 3x + (2 * x + x * x)) (6 + 3x + (2x + x2))

Combine like terms: 3x + 2x = 5x (6 + 5x + x2)

Factor a trinomial. (3 + x)(2 + x)

Final result:
(3 + x)(2 + x)</span>

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I'd say it's x + 1 < 17.
Because the operator should be included as a person as well.

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X= 3.1 is the answer

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The width of a rectangle is one more than twice its length. If the rectangle's perimeter is 44 cm, then its length is ____ cm.

EleoNora [17]

Answer:

Part 1) The length is 7 cm

Part 2) The rate of return is r=11%

Step-by-step explanation:

Part 1)

Let

x ----> the length of rectangle

y ----> the width of rectangle

we know that

The perimeter of rectangle is equal to

$P=2(x+y)$

$P=44\ cm$

$44=2(x+y)$

simplify

$22=x+y$ -----> equation A

The width of a rectangle is one more than twice its length

$y=2x+1$ ----> equation B

substitute equation B in equation A

$22=x+(2x+1)$

solve for x

$3x+1=22\\3x=21\\x=7$

therefore

The length is 7 cm

Part 2) we know that

The simple interest formula is equal to

$I=P(rt)$

where

I is the Final Interest Value

P is the Principal amount of money to be invested

r is the rate of interest

t is Number of Time Periods

in this problem we have

$t=1\ year\\ P=\$1,100\\ I=\$121\\r=?$

substitute in the formula above

$121=1,100(r*1)$

solve for r

$121=1,100(r)$

$r=121/1,100\\r=0.11$

Convert to percentage (Multiply by 100)

$r=0.11*100=11\%$

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X is the number:
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