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GuDViN [60]
2 years ago
12

Luis is saving up to buy a new phone. He already has $25 and can save an additional $6 per week using money from his after schoo

l job. How much total money would Luis have after 10 weeks of saving? Also, write an expression that represents the amount of money Luis would have saved in ww weeks.
Mathematics
2 answers:
sdas [7]2 years ago
3 0

Answer:

$85

Step-by-step explanation:

he would have $85 bc if u save 6 per week for 10 weeks that 60 yk so then 60 pu 25 is 85 not that hard tbh

8_murik_8 [283]2 years ago
3 0
Answer: after 10 weeks he will have saved 85 dollars.

Explanation: if you use y=6w+10, you can then fill in the blanks to answer the amount after 10 weeks; and from there on you’re able to use this equation for different amounts of time as well.
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How would I write these problems?
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21) Total number of cups: 26

6) Solution of the equation: x = -12

7) Father's age: 40

4) Distance driven: 400 miles

Step-by-step explanation:

21)

Let's call:

h=10 cm the height of each cup

H=30 cm the total height available in the dispenser

We are told that each cup added to the stack add a height of

\Delta h = 0.8 cm

We can therefore solve the problem by writing the following equation:

H=h+N\Delta h

which means that the total height available (H) is filled by the height of one cup (h) + the number of additional cup multiplied by 0.8.

Solving for N:

N=\frac{H-h}{\Delta h}=\frac{30-10}{0.8}=25

And including the first cup, the total number of cups is

N+1=25+1=26

6)

The equation that we have to solve is

\frac{5}{2}x-1=-31

We proceed as follows:

First of all, we add +1 on both sides of the equation,

\frac{5}{2}x-1+1=-31+1\\\frac{5}{2}x=-30

Now we multiply by 2 on both sides:

\frac{5}{2}x\cdot 2=-30\cdot 2\\5x=-60

And now we divide both sides by 5:

\frac{5x}{5}=\frac{-60}{5}\\x=-12

7)

Let's call:

k = Karma's age

f = father's age

We are told that Karma is 13 years old, so

k = 13

Also, Karma's age is 2 years less than 3/8 of the father's age, so we can write

k=\frac{3}{8}f-2

By combining the two equations,

13=\frac{3}{8}f-2

And solving for f, we find:

\frac{3}{8}f=13+2\\\frac{3}{8}f=15\\3f=15\cdot 8 =120\\f=\frac{120}{3}=40

So, the father's age is 40.

4)

Let's call:

T = 16 the total volume of the tank (16 gallons)

We also know that the car burns 0.03 gallons per mile, so the amount of fuel consumed after x miles is

0.03 x

This means that the amount of fuel left after x miles is

16-0.03x

We also know that the amount of fuel left is 4 gallons, therefore:

16-0.03x=4\\0.03x=16-4\\0.03x=12\\x=\frac{12}{0.03}=400

So, 400 miles.

Learn more about equations:

brainly.com/question/13168205

brainly.com/question/3739260

#LearnwithBrainly

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Answer:

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