Answer:
90
Step-by-step explanation:
Answer:
16/49
Step-by-step explanation:
4/7 ÷ 1 3/4
Convert 1 3/4 into an improper fraction
4/7 ÷ 7/4
Find the reciprocal of 7/4 and multiply
4/7 * 4/7
16/49
Hope this helps :)
-8+4x=-20x-25+7x
4x+20x-7x=-25+8
17x=-17 /17
x=-1
Answer:
Step-by-step explanation:
Given that
sample size n = 55: x bar = 654.16 and s = sample sd = 162.34
Std error = 162.34/sqrt 55 = 21.889
For 95% CI we can use t critical value as population std dev is not known.
df = 54
t critical = 2.004
Margin of error = 2.004 *21.889 = 43.866
Confidence interval lower bound = 654.16-43.866 =610.294
Upper bound = 654.16+43.866=698.026
Confidence interval rounded off at 95% = (610.29, 698.23)
Answer:
Step-by-step explanation:
From the given table,
To prepare a mixture of a paint, two paints of different shades have been added in the same ratio,
Since, 2 cups of blue paint are mixed with 10 cups of yellow paint
Therefore, ratio in which these shades have been added = 
= 
= 
= 5 : 1
For 1 cup of blue paint number of cups of yellow paint required,

x = 5 cups
For 3 cup of blue paint number of cups of yellow paint required,

x = 15 cups
Cups of blue paint Cups of yellow paint
2 10
1 5
3 15