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Alekssandra [29.7K]
2 years ago
7

Please help! Will mark brainliest

Mathematics
1 answer:
ser-zykov [4K]2 years ago
5 0

Answer:

Step-by-step explanation:

t1 = a1

t2 = a1 + d

t3 = a1 + 2d

The sum is t1 + t2 + t3 = a1 + a1 + d + a1 + 2d = 3a1 + 3d

Second question

t1 = a1

t2 = a1 + d

t3 = a1 + 2d

t4 = a1 + 3d

...

tn = a1 + (n - 1)*d

Sum = (a1 + a1 + (n- 1)*d) * n / 2

Sum = (2a1 + nd - d) * n / 2

Sum = (2a1*n + n^2*d - nd) / 2

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How many one-third packages can the worker make from 20 pounds of cookies?
andreev551 [17]

Answer: 60

Step-by-step explanation:

1/3 means 3 packages per 1 pound

3 x 20 + 60

5 0
3 years ago
before conducting some experiments, a scientist mixes 1/2 gram of Substance A with 3/4 gram of Substance B. If the scientist use
horrorfan [7]

Mixing the two ingredients would be adding them together:

1/2 gram + 3/4 gram = 1 1/4 total grams


Divide the total grams by 1/8 to find the number of experiments they can do:

1 1/4 / 1/8 = 5/4 / 1/8 = 5/4 * 8/1 = 40/4 = 10


They can conduct 10 experiments.


5 0
3 years ago
Giving brainliest to correct answer
Temka [501]

1.25

hope it helped and sorry if it's wrong i wish you luck

7 0
2 years ago
Read 2 more answers
Simplify the expression <br><br> -2b - 6 + 3b - 2
Scilla [17]
Hello!

To do this we need to combine like terms, meaning combine the terms that have the same variables.

b is one variable that can be combined:

-2b - 6 + 3b - 2
b - 6 - 2

Now, combine the digits:

b - 8

Hope this helped!
8 0
3 years ago
2(4x+5)-2=2x+44?<br>a.6<br>b.19/3<br>c.41/6<br>d.26/3​
Nastasia [14]
8x+10-2= 2x+44
8x+8= 2x+44
8x-2x= 44-8
6x= 36
x= 6

so A is the correct answer :)
8 0
3 years ago
Read 2 more answers
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