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4 years ago

Form a sequence that has two arithmetic means between -1 and 59.

Mathematics

2 answers:

Helga [31]4 years ago

6 0

Answer:

Step-by-step explanation:

The sequence will be arithmetic with 4 terms and a common difference d, which requires to be found.

The n th term of an arithmetic sequence is

$a_{n}$ = a + (n - 1)d

where a is the first term

here a = - 1, n = 4 and $a_{4}$ = 59, hence

- 1 + 3d = 59 ( add 1 to both sides )

3d = 60 ( divide both sides by 3)

d = 20, thus the four terms are

-1

- 1 + 20 = 19

19 + 20 = 39

39 + 20 = 59, that is

- 1, 19, 39, 59 → b

Digiron [165]4 years ago

5 0

Answer: B

i cant really explain much but it’s c

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3 years ago

You are remodeling your bedroom. You will paint all 4 walls and the door. There are no windows in the room. The floor is 9' by 1

Aleksandr [31]

Answer:

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Part 6) $\$850.5$

Part 7) $\$1,008$

Part 8) $\$472.5$

Step-by-step explanation:

Part 1) What is the area of all 4 walls together?

we know that

The area of all 4 walls together is equal to the perimeter of the floor multiplied by the height of the wall (8 ft)

The perimeter of the floor is

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$\frac{1}{350}\ \frac{gal}{ft^2}=\frac{x}{368}\ \frac{gal}{ft^2}\\\\x=368/350\\\\x=1.05\ gal$

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You will have to buy 2 gallons

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$368(2)=736\ ft^2$

using proportion

$\frac{1}{350}\ \frac{gal}{ft^2}=\frac{x}{736}\ \frac{gal}{ft^2}\\\\x=736/350\\\\x=2.10\ gal$

Remember that you can't buy a fraction of gallon

You will have to buy 3 gallons

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To find the cost multiply the number of gallons by $25 per gallon

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The area of the floor (rectangle ) is equal to multiply the length of the floor by the width of the floor

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Part 6) What is the cost to redo the floor in oak?

To find the cost multiply the area of the floor by $6.75 per square foot

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Part 7) What is the cost to redo the floor in maple?

To find the cost multiply the area of the floor by $8.00 per square foot

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To find the cost multiply the area of the floor by $3.75 per square foot

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Answer:

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Step-by-step explanation:

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