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3 years ago

6

The last term of an arithmetic sequence is 25, the common difference is 4, and the number of the terms is 9. What is the first t

erm?

1 answer:

Dafna11 [192]3 years ago

6 0

If you start at 25 and count down by 4, 8 times the answer you get is negative seven. so; -7, -3, 1, 5, 9, 13, 17, 21, 25.

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A pole, 90 cm long, is painted green, white, and black in the ration 3:4:2. What length of the pole is painted black?

ollegr [7]

3u + 4u + 2u = 9u
9u = 90
1u = 90/9 = 10

since black is 2u ( from the ratio given)
2u = 10 x 2 = 20

Answer : 20cm of the pole is painted black.

The bar diagram is in the picture :)

3 0

4 years ago

Add: (−2x^2 + 9x − 3) + (7x^2 − 4x + 2)

borishaifa [10]

Answer:

5x^2+5x-1

Step-by-step explanation:

-2x^2+9x-3+7x^2-4x+2=5x^2+5x-1

8 0

4 years ago

Pipers Pizza shop used 18% more cheese this month than last month, due to having a discount on the extra chesse toppings. If the

GenaCL600 [577]

Answer:

177 pounds

Step-by-step explanation:

Create an equation to represent the system.

Since it's 18% more than what was used last month an equation can be written such as the one below:

(118%)( last month's cheese ) = this month's cheese

Convert the percentages into decimals by moving the decimal place at the end of 118.00 two places to the left

118% = 1.18

( 1.18 )( last month's cheese ) = this month's cheese

Next, plug in the number for last month's cheese

( 1.18 )( 150 pounds) =

177 pounds

3 0

3 years ago

saw5 [17]

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3 years ago

Abel was wrapping a gift for an upcoming party. He began with 20 1/2 feet of paper. He used 5 5/12 feet on his first gift and 3

FrozenT [24]

Hey there!

$20 \dfrac{1}{2} - 5 \dfrac{5}{12} - 3 \dfrac{1}{3} + 2 \times 10 \dfrac{1}{2} \\ = \dfrac{41}{2} - \dfrac{65}{12} - \dfrac{10}{3} + 21 \\ = \dfrac{246}{12} - \dfrac{65}{12} - \dfrac{40}{12} + 21 \\ = \dfrac{141}{12} + 21 \\ = 32 \dfrac{3}{4}$

Answer : 32 3/4 feet or in decimal form, 32.75 feet.

Hope this helps. - M

5 0

3 years ago

Read 2 more answers