a = amount (in oz) of solution A
b = amount of solution B
The scientist wants a mixture of 110 oz, so
a + b = 110
Solution A consists of 65% salt, so each ounce of solution A contributes 0.65 oz of salt; similarly, each ounce of B contributes 0.9 oz. The mixture is supposed to consist of 75% salt, which amounts to 0.75 * (110 oz) = 82.5 oz of salt. So
0.65 a + 0.9 b = 82.5
Solve for a and b:
b = 110 - a
0.65 a + 0.9 (110 - a) = 82.5
0.65 a + 99 - 0.9 a = 82.5
0.25 a = 16.5
a = 66 ==> b = 44
Answer:
Estimate = 3400 books
Step-by-step explanation:
Given that:
Books read by students.
Kindergarten 247
First grade 385
Second grade 1347
Third grade 1549
We have to round the each number to nearest hundred.
247 rounded to the nearest hundred is 200.
385 rounded is 400
1347 rounded is 1300
1549 rounded is 1500
Total = 200 + 400 + 1300 + 1500 = 3400
Hence,
Estimate = 3400 books
Answer:
a.)5/24, b.)3/5, c.)5/28, d.)12/45, e.)3/12
Step-by-step explanation:
a.)5/8times1/3=5/24
b.)3/4times4/5=3/5
c.)5/7times1/4=5/28
d.)3/5times4/9=12/45
e.)3/6times2/4=3/12
It’s A because the y column contains a different set of numbers.
10 inches because there are 4 sides of a square so, if the perimeter is 40 inches, to figure out the side lengths you just have to divide the perimeter by 4
