X-13=42
x is the "variable", you're taking 13 away from that, and the answer is also given, 42.
Answer:
0.7
Step-by-step explanation:
-2n +1.8 = 3.2
-2n = 3.2 - 1.8
-2n = 1.4
2n = - 1.4
n = 1.4 ÷ 2 = 0.7
A store sells tea cups in sets of 9 and saucers in sets of 12. The store sold the same number of individual cups and saucers in the same day. What is the least number of individual cups and saucers the store could have sold?
Answer:
12
Step-by-step explanation:
skeins of yarn purchased = 11
Feets per skein = 660 feets
Total number of feets purchased = (11 * 660) = 7260 feets
To make a scarf :
1 scarf = 200 yards
Recall :
1 yard = 3 feets
Hence,
1 scarf = (200 *3) = 600 feets
Number of scarf that can be made :
Total feets of yarn / Number of feets per scarf
= 7260 / 600
= 12.1
Hence, number of scarfLee can make for shelter is 12 (nearest whole number)
To answer this, you need to make a systems of equations.
25x + 35y = 1450
x + y = 50 ----> y = 50 - x
25x + 35(50-x) = 1450
25x + 1750 - 35x = 1450
25x - 35x + 1750 = 1450
-10x + 1750 = 1450
- 1750 -1750
-10x = -300
x = 30
He played tennis for 30min