How do you solve d+12=2 using mental math

The ratio of alls weight to bobs weight is 4:5, the ratio of bobs weight to lunas weight is 6:7, what is the ratio of alls weight to lunas weight?

A catering service offers 6 appetizers 7 main courses and 3 desserts A customer is to select 3 appetizers 3 main courses and 2 deserts for a banquet in how many ways can this be done

Express the fractions 3/4, 7/16 and 5/8 with the lowest common denominator a. 24/32, 14/32, 24/32 b. 12/16, 7/16, 10/16 c. 3/4, 2/4, 3/4 d. 9/16, 49/16, 36/16

Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 600 and a standard deviation of 120. Use the 68 dash 95 dash 99.7 Rule to find the percentage of people taking the test who score between 240 and 960.

Is (3,5) a solution to y=x-4?

10 and three over 4-71 over for

The altitude of an airplane is the height of the airplane above ground. what do you think the altitude of a triangle is?

X=3 y = 5x - 8 in alias

What is 3498 divided by 7. Explain how you got this answer and why you think its reasonable

What is the answer to these 9 + 9n = 9