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slega [8]
3 years ago
7

You and your friend spent a total of $15 for lunch. Your friend’s lunch cost $3 more than your lunch cost. How much did you spen

d for lunch?
Mathematics
2 answers:
castortr0y [4]3 years ago
6 0
The Answer is 6 Dollars

Well here there are two parts You and your friend spent 15 dollars your friends lunch cost 3 more than yours <span>

6=x is the amount you spent on lunch.
Your friend spent $3 more so add $3 to the amount you spent to get...
$9 spent by your friend. 
You=$6
Friend=$9
Total=$15
To prove the solution is valid, plug 6 in for x. 
15=3+2(6)
15=3+12
15=15 thus proving the solution is valid.</span>
Veronika [31]3 years ago
4 0
To solve for this, we will create a system of equations.
x + y = 15
x = y + 3
Let's try numbers that add up to 15.
I will try 6 and 9, 9 for x, 6 for y.
6 + 9 = 15
9 = 6 + 3
These system of equations works!
Since x is your friend's lunch, y is yours.
You spent $6.
I hope this helps!

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The sum of 7 and three times a number is at least 13
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Answer:

7 + 3x ≥ 13

Step-by-step explanation:

The best way to write this is to truly understand what each of the terms mean. The sum means that multiple terms are added together, which means that 7 and 3 times a number will be added together.

Next, the term three times a number just means 3x. So as of now, we have 7 and 3x being added together.

Finally, the term at least 13 means that the 7 + 3x is greater than or equal to 13. Once everything is put together, you get a final inequality of 7 + 3x ≥ 13.

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2 years ago
if Leah makes $9.50 per hour and she works 36 hours this week, how much will her paycheck be before taxes?
Dafna11 [192]

Answer:

Leah makes $342 before tax.

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9.50 x 36 = 342

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2 years ago
Read 2 more answers
Given x=-3, y=6, and z=-4<br> -15+(-x)+y=
Alexus [3.1K]

Answer:

-6

Step-by-step explanation:

We are given x=- 3 , y= 6 and z= -4.

We are also given the expression:

-15 + (-x) +y

Substitute -3 in for x and 6 in for y.

-15 + (- -3) + 6

2 negative signs creates a positive sign

-15 + (+3) +6

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Add -15 and 3.

(-15+3) +6

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Add -12 and 6.  

-6

-15+(-x)+y evaluated at x= -3 and y=6 is equal to -6.

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elena-s [515]

Answer:

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Step-by-step explanation:

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