After w weeks, a student has saved 25+8w dollars. How much money has the student saved after 15 weeks?
Answers
How much money has the student saved after 15 weeks is $145
Given:
Amount saved after w weeks=25+8w dollars
Amount saved After 15 weeks=?
Hence:
Amount saved After 15 weeks=25+8(15)
Amount saved After 15 weeks=25+120
Amount saved After 15 weeks=$145
inconclusion How much money has the student saved after 15 weeks is $145.
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Answer:
$145.00
Step-by-step explanation:
Since w is the number of weeks, substitute the w in (25+8w) with 15
y = 25 + 8(15)
y = 25 + 120
y = 145
The student saved $145.00 after 15 weeks
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Answers
This means that if there are 3 quarts, and each quart contains 32 ounces, 3 quarts have 96 ounces.
3 quarts * 32 oz = 96 oz
Now, set up a proportion.
8 oz is to $4.50 as 96 oz is to "x"
8 oz = $4.50
96 oz = x
Cross multiply to solve.
4.50 * 96 = 8x
432 = 8x
Divide both sides by 8:
x = 54
3 quarts of coffee would cost $54.
This doesn't make sense in a real life situation, but I'm confident that it is correct.
Answers
There are 4 quarts in one gallon:
1 gal = 4 qt
Then, we want to find the number of quarts in 19 gallons. We can write a proportion:
1/4 = 19/x
Cross multiply:
x = 76 quarts.
There are 76 quarts in 19 gallons.
76 quarts in 19 gallons
B. 1/3
C. 2/3
D. 11/12
Answers
Answers
Then simplify.
The reason why 100 is denominator is because:
In French, cent ( from percent ) means hundred. So for example,
22% is 22/100
35% is 35/100.
Answers
The numbers by writing and solving a system of equations are 50 and 105
System of equations
Let the unknown numbers be x and y
If twice a number plus twice a second number is 310, then;
2x + 2y = 310
x + y = 155
x = 155 - y
Also, If the difference of the numbers is 55, hence;
x - y = 55
155 - y - y = 55
155 - 2y = 55
-2y = 55 - 505
2y = 100
y = 50
Substitute y = 25 into 1 to have:
x = 155 - 50
x = 105
Hence the numbers by writing and solving a system of equations are 50 and 105
Learn more on system of equations here: brainly.com/question/847634
The difference between the numbers is 55.
Divide the first equation by 2 to get a 3rd equation:
Add the second and third equations together:
Put x=105 into the second equation to get:
So you're answers are x=105 and y=50.