Answer:
A sandwich is $3.50 and the price of a drink is $2.50
Step-by-step explanation:
Create a system of equations where s is the price of a sandwich and d is the price of a drink:
9s + 5d = 44
15s + 7d = 70
Solve by elimination by multiplying the top equation by 7 and the bottom equation by -5, then adding them together:
63s + 35d = 308
-75s - 35d = -350
Add them together:
-12s = -42
s = 3.5
Then, plug in 3.5 as s into one of the equations to solve for d:
9s + 5d = 44
9(3.5) + 5d = 44
31.5 + 5d = 44
5d = 12.5
d = 2.5
So, a sandwich is $3.50 and the price of a drink is $2.50
If you are evaluating the answer is -41
A square root of a number is simply the numbers multiplied to get to the specified one. For example, the square root of 81 is 9 because 9 x 9 (or 9 squared) equals 81.
Hope this helps!
First, simplify the inequality by getting the x term with a coefficient of 1.
Divide both sides by -7. When you multiply or divide an equality by a negative number, you flip the inequality sign the opposite way.
-7x / -7 < -21 / -7
x > 3
In set build notation is would look like this: {x | x > 3}
Which would be read as "the set of all x, such that, x is greater than 3".
1,000/40= 25 calculators
1,000/40.30=24.8
she can only buy 24 calculators all together
