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g100num [7]
3 years ago
7

A

Mathematics
1 answer:
kozerog [31]3 years ago
8 0

The following questions are related to problems on simple fraction and arithmetic. Hence, the solutions to the questions are as follows :

1.)

Time on mathematics =<em> 1 hour</em>

Time on science homework = <em>7/8</em><em> hours</em>

Total time spent = (1 + 7/8) = 1 \frac{7}{8}

2.)

Total number of students = <em>60</em>

Fraction of girls = <em>3/4</em>

Fraction of boys = 1 - 3/4 = 1/4

Number of boys = 1/4 × 60 = 15 boys

3.)

Initial temperature = <em>- 2°C</em>

Final temperature = <em>8°C</em>

Change in temperature = Final temperature - Initial temperature

Change in temperature = (8 - (-2)) = 8 + 2 = 10°C

4.)

Elevation of everest = <em>20028 feets </em>

Elevation of dead sea =<em> - 485 feets</em>

Difference in elevation = (20028 - (-485)) = 20513 feets

5.)

Question is missing key values.

Learn more : brainly.com/question/10483418

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one orange and one apple cost 1.05, two oranges and three apples cost $2.75, how much do two apples cost?
Nimfa-mama [501]
If you would like to know how much do two apples cost, you can calculate this using the following steps:

o ... the cost of one orange
a ... the cost of one apple

1 * o + 1 * a = $1.05
2 * o + 3 * a = $2.75
_______________
o + a = 1.05 ... o = 1.05 - a
2 * o + 3 * a = 2.75
2 * (1.05 - a) + 3 * a = 2.75
2.1 - 2 * a + 3 * a = 2.75
a = 2.75 - 2.1
a = $0.65

o = 1.05 - a = 1.05 - 0.65 = $0.4

2 * a = 2 * 0.65 = $1.3

The correct result would be: Two apples cost $1.3.
5 0
3 years ago
If 4a^2 = 144 then a is?
lilavasa [31]
4a²=144
a²=144/4
a²=36
a=⁺₋√36
a=⁺₋6

Answer: we have two values for a; a=-6; and a=6

we check it out:
if a=-6
4(-6)²=4*36=144

if a=6
4(6)²=4*36=144
4 0
3 years ago
Divide 300 in a ratio of 3/7
Talja [164]

in short, we simply divide the whole 300 by (3+7), to get in a 3:7 ratio, and then distribute accordingly.


\bf 300\qquad 3:7\qquad \cfrac{3}{7}~\hspace{5em}\cfrac{3\cdot \frac{300}{3+7}}{7\cdot \frac{300}{3+7}}\implies \cfrac{3\cdot 30}{7\cdot 30}\implies \cfrac{90}{210}\implies 90:210

7 0
3 years ago
Pleaseeee helppp i keep getting the wrong so can somebody give me the correct answer
Ne4ueva [31]

Answer: 39.25 miles per gallon.

Step-by-step explanation: To find miles per gallon, divide 314 miles by 8 gallons =

39.25 miles per gallon.


7 0
3 years ago
Read 2 more answers
Eva's coin purse contained 10 more dimes than nickels. The total value of the nickels and dimes was $10. How many coins of each
salantis [7]

Answer:

60 nickels

70 dimes

Step-by-step explanation:

convert $10 to cents

$10 = 1000 pennies

1000 = 5x + 10 (x+10)

1000 = 15x + 100

900 = 15x

x = 60

60 nickels

70 dimes

check to be sure this adds up to $10

7 0
3 years ago
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