The answer is 115.5. Let me know if you need me to explain
Answer:
Total number of bracelets Brianna have are 12 .
Step-by-step explanation:
Let us assume that the total numbers of the bracelets be x .
As given
Brianna has 4 pink bracelets.
One third of all her bracelets are pink .
Than the equation becomes
Simplify the above
x = 4 × 3
x = 12
Therefore the total number of bracelets Brianna have are 12 .
Answer:
Step-by-step explanation:
So A = the child is 5-10 years old and B = the child is 11-13 years of age and that covers all the children in the study. I = calcium intake is inadequate.
Answer:
4.8
Step-by-step explanation:
You just subtract to solve for d so,
8.2 = 3.4 + d
-3.4 -3.4
4.8 = d
Answer:
- The system of equations is x + y = 85 and 7/20x+2/5y=31
- To eliminate the x-variable from the equations, you can multiply the equation with the fractions by 20 and multiply the other equation by -7.
- B-She used 60 minutes for calling and 25 minutes for data.
Step-by-step explanation:
It is always a good idea to start by defining variables in such a problem. Here, we can let x represent the number of calling minutes, and y represent the number of data minutes. The the total number of minutes used is ...
x + y = 85
The total of charges is the sum of the products of charge per minute and minutes used:
7/20x + 2/5y = 31.00
We can eliminate the x-variable in these equations by multiplying the first by -7 and the second by 20, then adding the result.
-7(x +y) +20(7/20x +2/5y) = -7(85) +20(31)
-7x -7y +7x +8y = -595 +620 . . . . eliminate parentheses
y = 25 . . . . . . . . simplify
Then the value of x is
x = 85 -y = 85 -25
x = 60
