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2 years ago

What is 1/2 + blank = 7/8?

Mathematics

1 answer:

kap26 [50]2 years ago

7 0

Answer: 3/8
Explanation: You need to write all the numerators above the least common denominator, 8.
7-4/8

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Express 20 hours at the percentage of 10 days pllzzzz

Oliga [24]

Step-by-step explanation:

a day =24hrs so 10 days=240hrs

20hrs/240hrs ×100%to get the percentage

20/240×100%=8 1/3

6 0

2 years ago

Read 2 more answers

Write an equation that would be perpendicular to the following equation- y= -1/5 x + 8

brilliants [131]

Answer:

y=5x+8

Step-by-step explanation:

If its perpendicular it will have opposite slope but the same y intercept

8 0

2 years ago

What is the y-intercept of the line shown below? A:3/4 B:2 C:3 D:4

olya-2409 [2.1K]

The y-intercept is the y value where the blue line crosses the Y axis which is the vertical black line.

The line crosses at the number 4, so the y-intercept is 4

Answer: D. 4

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2 years ago

Help please I don’t understand

Zanzabum

Answer: 2/3

Step-by-step explanation:

there are 24 pets total (count all of the dots on the plot)

16 students have 2 or more pets (count the dots from point 2 until 6)

your fraction is 16/24

16/24 is 2/3 simplified

hope this helps

8 0

3 years ago

The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).

lesantik [10]

Answer:

(a).

$S_{n} = \frac{n}{2} (4n + 20) \\ \\S _{n - 1} = \frac{(n - 1)}{2} (4n - 4 + 20) \\ \\ S _{n - 1} = \frac{(n - 1)}{2} (4n + 16) \\ \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2} \\ \\ { \boxed{S _{n - 1} = {2 {n}^{2} + 6n - 8}}} \\$

(b).

from general equation:

$S _{n - 1} = \frac{(n - 1)}{2} (4n + 16)$

first term is 4n

common difference:

$16 = \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d = \frac{16}{n - 2}$

8 0

3 years ago