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Minchanka [31]
3 years ago
14

Maria spend 5 hours studying and earned a 90 on her exam. If you want to score a 81, how much time do you need to spend studying

?
Mathematics
1 answer:
Oliga [24]3 years ago
7 0

Answer:

4hrs 30 mins

Step-by-step explanation:

5hrs-90

x-81

cross multiplying gives us

405-90x then dividing through made x=4.5 which is = 4hrs 30mins

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Megan hiked 15.12 miles in 6.3 hours. If Megan hiked the same number of miles each hour , how many miles did she hike each hour?
OLEGan [10]
To find how many miles per hour, we divide the number of miles hiked by the number of hours it took to hike them.

=15.12 miles ÷ 6.3 hours
=2.4 miles hiked per hour

Hope this helps! :)
7 0
3 years ago
The graph shows the cost, C, of sending m text messages. What is the cost per message?
Travka [436]

Answer:

C.$0.15 I TOOK IT ON STUDY ISLAND

Step-by-step explanation:

First, you want to find an exact point on the graph.  What I mean by this is you want to go somewhere on the graph where the line goes through an exact y and x value.

Second, you want to figure out where this x and y value are.  Where the graph first goes through two points is at (20, 3).

Third, you want to figure out what the 20 and the 3 mean.  20 is the number of messages and 3 is the dollar amount.

Finally, to calculate the amount of money per message, you divide the dollar amount (3) by the number of messages (20).  So, you have 3/20.  After this, simplify 3/20 to get 0.15, or 15 cents per message.

3 0
3 years ago
Need a lil bit of help
SashulF [63]

Answer:

Step-by-step explanation:

yes

3 0
3 years ago
Read 2 more answers
Please help 10pts each
cestrela7 [59]
X=2

subtract 5x on both sides
-2x=-4
divide by -1 on both sides
2x=4
divide by 2 on both sides
x= 2
6 0
2 years ago
Read 2 more answers
What is the domain of the function represented by the graph? A graph shows an upward parabola on a coordinate plane vertex at (m
vlabodo [156]

Using it's concept, the domain of the function represented by the graph is all real numbers.

<h3>What is the domain of a function?</h3>

The domain of a function is the set that contains all possible input values for the function.

In this problem, a parabola is used, which has no restriction such as an even root or a fraction, hence the domain is all real values.

More can be learned about the domain of a function at brainly.com/question/10891721

#SPJ1

3 0
2 years ago
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