Answer:
Crafts books: 7
Cookbooks: 13
Step-by-step explanation:
Let x be the crafts book
Let y be the cookbooks
Solve for x:
- Plug x and y in: x + y = 20
- Re-write: y = x + 6
- Plug in x + 6 instead of y: x + x + 6 = 20
- Combine like terms: 2x + 6 = 20
- Subtract 6 from each side, so it now looks like this: 2x = 14
- Divide each side by 2 to cancel out the 2 next to x. It should now look like this: x = 7
Solve for y:
- Re-use an equation from above: y = x + 6
- Plug in the value of x: y = 7 + 6
- 7 + 6 = 13
- So, y = 13
I hope this helps!
Answer:
Step-by-step explanation:
From the information given :
The null hypothesis 
The alternative hypothesis 
Given that:
the sample size n = 21
sample standard deviation s = 68
population standard deviation σ = 60
a) The level of significance 
b) The chi-square statistics can be calculated as:
The degree of freedom is :
= n - 1
= 21 - 1
= 20
Theoretically 10 because the 50/50 chance realistically though you'll get more or less
Answer:
4 ounces
Step-by-step explanation:
46/92 is one half so the recipe out of 100 is divided in half
8/2=4
the recipe also doesn't sound to appetizing
Answer:
Step-by-step explanation:
5x + 12 = 5x - 7
12 ≠ -7
