Answer:
paper clips = $1.85
index cards = $3.95
Step-by-step explanation:
Mark
12 paper clips = x
10 index cards = y
$61.70 total
Janice
15 paper clips = x
7 index cards = y
$55.40 total
12x + 10y = 61.70
15x + 7y = 55.40
*** you want to cancel out one of the letters
(12x + 10y = 61.70) * -7
(15x + 7y = 55.40) * 10
-84x -70y = -431.9
150x + 70y = 554.0
150x + 70y = 554.0
-84x -70y = -431.9
66x + 0 = 122.1
66x = 122.1
x = 122.1 ÷ 66
x = 1.85
plug it back in
15(1.85) + 7y = 55.40
27.75 + 7y = 55.40
7y = 55.40 - 27.75
7y = 27.65
y = 27.65 ÷ 7
y = 3.95
Answer:
D
Step-by-step explanation:
If he travels 230 miles on 10gallons of fuel, then he will travel 23 miles on 1 gallon of fuel. So it is 230 gallons to one mile.
Answer:
93
Step-by-step explanation:
(10+4)(7) - 45 / 9
= (14)(7) - 45 / 9
= 98 - 5
= 93
So basically there is an increase by 15% and 35% of $35.
You find out:
5 % of $ 35 = 1.75
10% of $35 = 3.5
15% of $35 = 5.25
30% of $35 = 10.5
35% of $ 35 = 11.25
5.25 + 11.25 = $16.5
$35 + $16.5 = $51.5
The answer is $51.50
I hope this was helpful and the brainliest answer :p
Lambodar hai toh yeh student Student was asked to calculate the missing leg of the