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butalik [34]
3 years ago
9

Answer the following questions.

Mathematics
1 answer:
tatiyna3 years ago
8 0

(a) 55% of 60 is 33

(b) 85% of 80 is 68

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write a system of linear equations that has only one solution. solve the system of equations in two ways.
Iteru [2.4K]
X + 5y = 1 . . . . (1)
8x - 2y = 3 . . . .(2)
Solution 1.
From (1), x = 1 - 5y
substituting for x in (2), we have:
8(1 - 5y) - 2y = 3
8 - 40y - 2y = 3
8 - 42y = 3
42y = 5
y = 5/42
x = 1 - 5(5/42) = 1 - 25/42 = 17/42.

Solution 2.
Multiply (1) by 8, to get:
8x + 40y = 8 . . . . . (3)
(3) - (2) = 40y - (-2y) = 8 - 3
42y = 5
y = 5/42
substitute for y into (3), to get:
8x + 40(5/42) = 8
8x + 100/21 = 8
8x = 8 - 100/21 = 68/21
x = (68/21)/8 = 17/42
7 0
3 years ago
What's ?????28x90???
ad-work [718]

Answer:

2520

Step-by-step explanation:

3 0
3 years ago
Madison's family traveled 5 7 of the distance to her uncle's house on Saturday. They traveled 1 2 of the remaining distance on S
Pepsi [2]

Answer:

The fraction of the total distance to her uncle's house that was traveled on Sunday is 1/7

Step-by-step explanation:

Let the total distance from Madison house to her uncle is 1 unit

She travels 5/7th of the total distance on Saturday

Remaining distance = 1-\frac{5}{7} = \frac{2}{7}

She travels 1/2 of the remaining distance on Sunday.

Hence, the fraction of the total distance to her uncle's house that was traveled on Sunday is 1/2 * 2/7 = 1/7

3 0
3 years ago
Henlo please help!?! Thanks!!<br> ASAP? :D
erik [133]

Answer:

6 feet

Step-by-step explanation:

Volume = w × h × l

120 = 4 × 5 × l

l = 120 / 20

l = 6 ft

4 0
3 years ago
Read 2 more answers
The distance from Charles’s house to his school is 3 miles. His father gave him a ride for 1,760 yards, and he walked the rest o
slamgirl [31]
The answer is 2 miles or 3520 yards. (they are the same answer.)

If this helps, can you give me the brainliest answer? I need it...

Thank you very much.
8 0
3 years ago
Read 2 more answers
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