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aleksandrvk [35]
2 years ago
8

Please help!!!!!!!!!

Mathematics
1 answer:
Delicious77 [7]2 years ago
8 0

Answer: 45 + 30 = 75

Step-by-step explanation:

Hope this helped

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1. Calculate the area of the<br> figure below. Round to the<br> hundredths place when<br> necessary.
a_sh-v [17]

Answer:

The area is 88.39 cm

Step-by-step explanation:

Here, we want to find the area of the semicircle given that the diameter of the semi circle is 15 cm

We start by getting the radius

Mathematically r = D/2

= 15/2 = 7.5

Area of semicircle is area of circle/2

= (pi * r^2)/2

= (22/7 * 7.5^2)/2 = 88.39 cm

5 0
3 years ago
If an arithmetic sequence has a4 = 107 and a8 = 191, what is a₁?<br>PLEASE HELP ME​
katen-ka-za [31]

\text{nth term of  an arithmetic sequence,}\\\\a_n = a_1 + (n-1)d\\\\a_4 = a_1 +3d=107~~~......(i)\\ \\a_8=a_1+7d = 191~~~......(ii)\\\\\\\text{(ii) -(i):}\\\\~~~~~~a_1+7d-a_1-3d = 191 -107\\\\\implies 4d = 84\\\\\implies d = \dfrac{84}4\\\\\implies d= 21\\\\\text{Substitute d= 21  in eq~(i):}\\ \\~~~~~ a_1 +3(21) =  107\\\\\implies a_1 + 63 = 107\\\\\implies a_1 = 107-63\\\\\implies a_1 =44

3 0
2 years ago
This math problem makes me wanna kym
jek_recluse [69]

Answer:

-5-1/4

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Peter is buying office supplies. He is able to buy 3 packages of paper and 4 staplers for $40, or he is able to buy 5 packages o
Lina20 [59]

Answer:

paper = $4 and stapler = $7

Step-by-step explanation:

let p represent paper and s represent stapler, then

3p + 4s = 40 → (1)

5p + 6s = 62 → (2)

Multiplying (1) by 5 and (2) by - 3 and adding will eliminate p

15p + 20s = 200 → (3)

- 15p - 18s = - 186 → (4)

Add (3) and (4) term by term to eliminate p

2s = 14 ( divide both sides by 2 )

s = 7

Substitute s = 7 into either of the 2 equations and evaluate for p

Substituting into (1)

3p + 4(7) = 40

3p + 28 = 40 ( subtract 28 from both sides )

3p = 12 ( divide both sides by 3 )

p = 4

Thus package of paper costs $4 and stapler costs $7

6 0
3 years ago
SMART PEOPLE PLEASE HELP!!!
pychu [463]

Answer:

yes I agree.both answer is same.I.e.15

8 0
3 years ago
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