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Lelu [443]
3 years ago
14

Help me please!! will mark brainliest!

Mathematics
2 answers:
WITCHER [35]3 years ago
8 0
10 hours seems like the most reliable answer because it matches up the best
Ahat [919]3 years ago
4 0

Answer:

18 hours of study should be the answer

Step-by-step explanation:

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LOOK AT THE PICTURE PLEASE QUICK ITS EASY
max2010maxim [7]

Answer:

C or d

Step-by-step explanation:

4 0
2 years ago
The tickets for a dance recital cost $5.00 for adults and $2.00 for children. If the total number of tickets sold was 295 and th
dem82 [27]
To solve, you would need to make two equations and substitute one in for the other. Let a = # of adults, and c = # of children

5a + 2c = 1,220
a + c = 295

a + c = 295
-c         -c
a = 295 - c

5(295 - c) + 2c = 1,220
1,475 - 5c + 2c = 1,220
1,475 - 3c = 1,220

1,475 - 3c = 1,220
-1,475           -1,475
-3c = -255

-3c/-3 = -255/-3
c = 85

a + c = 295
a + 85 = 295
     -85    -85
a = 210

210 adults attended the dance recital

Hope this helps!
6 0
3 years ago
The chemistry class was making 300 gallons of 30% isopropyl alcohol. They mixed 12% with 42%. How much of each did they use?
alexgriva [62]

Answer:

<u>The chemistry class mixed 120 gallons of 12% isopropyl alcohol and 180 gallons of 42% isopropyl alcohol.</u>

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Amount of isopropyl alcohol made by the chemistry class = 300 of 30%

Amount of 12% isopropyl alcohol mixed by the chemistry class = x

Amount of 42% isopropyl alcohol mixed by the chemistry class = 300 - x

2. How much of each did they use?

Let's write our equation to solve for x, this way:

30% = 0.3, 12% = 0.12, 42% = 0.42

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12x + 126 - 0.42x = 90

-0.3x = 90 - 126

-0.3x = -36

x = -36/-0.3

<u>x = 120 ⇒ 300 - x = 180</u>

<u>Let's prove x = 120 is correct</u>

0.12x + 0.42 (300 - x) = 0.3 * 300

0.12 * 120 + 0.42 (300 - 120) = 0.3 * 300

14.4 + 75.6 = 90

90 = 90

<u>We proved x = 120 is correct</u>

5 0
3 years ago
What is 8.275 rounded to the nearest ounce?​
Crank

Answer:

8.0

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Diego is building a kitchen table and a coffee table. The legs of a kitchen table must be twice the height of a coffee table and
muminat
The answer is B as the coefficient represents the number of legs
6 0
3 years ago
Read 2 more answers
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