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IRINA_888 [86]
2 years ago
12

TEST quest helpppp 30pts

Mathematics
1 answer:
enyata [817]2 years ago
3 0

Answer:

i think it is 1

Step-by-step explanation:

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Simplify the following:<br> *<br> 9 – 13<br> Your answer
tresset_1 [31]
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6 0
2 years ago
A partial sum of an arithmetic sequence is given. Find the sum.
Nezavi [6.7K]

Answer:

72.3

Step-by-step explanation:

Given that:

The arithmetic sequence:

\sum \limits ^{14}_{k=0} (3 + 0.26k)

The first term of the sequence a_0 = 3 since k = 0

i.e (3 + 0.26(0)) = 3

The last term of the sequence a_{14} = 6.64

i.e (3+ 0.26(14)

= (3 + 3.64)

= 6.64

Total no of terms = 15 i.e from 0 to 14

∴

The partial sum of the arithmetic sequence = \dfrac{Total \ no \ of \ terms }{2}  \times (a_o+a_{15})}

=\dfrac{15 }{2}  \times (3+6.64)}

= 72.3

3 0
2 years ago
The sum of 30 times (1-3)^(n-1) from n=1 to infinity
kati45 [8]

I can’t do it rn so just dm me later

7 0
2 years ago
Preston can paint 375 square feet in 3 hours. At the same rate, how long would it take him to paint 812.5 square feet?
charle [14.2K]

Answer:

6.5 hours

Step-by-step explanation:

First try to find the rate he can paint per hour

375 ÷ 3 = 125 ft^2 per hour

Then try to find how long it should take it for him to paint 812.5 sq ft

812.5 ÷ 125 = 6.5 hours

6 0
3 years ago
Simplify.
ASHA 777 [7]

Answer:

C

Step-by-step explanation:

The answer is 16x-20. First, you have to distribute 12 and 4 making the equation 12x-48+4x+28. Then, you combine the like terms giving you 16x-20. Hope this helped.

4 0
3 years ago
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