Answer:
12 sandwiches
Step-by-step explanation:
To find the number of sandwiches sold, divide the total money by the cost of each sandwich.
71.40 ÷ 5.95 = 12
Answer:
4/2
Step-by-step explanation:
Answer:
Answer
Step-by-step explanation:
21+3+6
= 30
Ratio of parents = 21
10% of 30 = 30/10
= 3
21 is __% of 30
= 21/30 * 100
= 0.7 * 100
= 70%
Answer: 100mL
Step-by-step explanation:
A 15% alcohol solution contains 15mL alcohol in 100mL solution
In 400ml there will be 400mL·15/100 = 6,000mL/100 = 60mL alcohol
Let the volume of pure alcohol to be added V.
In the new solution there will be (60 + V)mL alcohol
And the total volume will be (400 + V)mL
Concentration required 32% = 0.32
Concentration = (60 + V)mL/(400 + V)mL = 0.32
60mL + VmL = 0.32(400 + V)mL
60mL + VmL = 128mL + V·*0.32mL
VmL - V·0.32mL = 128mL - 60mL = 68mL
V(1 - 0.32)mL = 68mL
V·0.68mL = 68mL
VmL = 68mL/0.68 = 100mL ► alcohol volume to be added
Answer : 100mL
Verification
New solution
There will be 400mL + 100mL = 500mL total volume
There will be 60mL alcohol + 100mL alcohol = 160mL alcohol
The concentration will be 160mL/500mL = 0.32 = 32%
The slope is 2
y2-y1/x2-x1
(9,-1) (4-11)
-1+11/9-4
10/5
2