Answer:
b - (-48)+c 
Step-by-step explanation:
<u><em>Explanation</em></u>
Given b =2 and c= - 7/4
Given equation is b -(-48) + c
Answer should be <span>Both Fred's and Victoria's proofs are correct.</span>
Answer: B - 28.26 ft^2
Step-by-step explanation:
Formula is pi x r^2
3.14158 x 3^2 = 28.26
Answer:
The correct answer is 40 cm.
Answer:
There are 68 students in the class after these changes.
Step-by-step explanation:
g = number of girls
b = number of boys
Because the ratio of girls to boys is 3:1, initally the equation was
g = 3b
Finally, we have
g-1 girls because one girl dropped the class
b+3 boys because three more boys signed up
Because the new ratio of girls to boys is 5:2, the new equation is
(g - 1)/(b + 3) = 5/2
Cross multiply.
2(g - 1) = 5(b + 3)
2g - 2 = 5b + 15
2g - 5b = 17
Then, substitute g (which is 3b because the first equation was g = 3b)
2(3b) - 5b = 17
b = 17
g = 3b = 3*17 = 51
g = 51
The final number of students in the class = 17 + 51 = 68
Answer: 68
