Answer:
D. Substitution
Step-by-step explanation:
I don't know how to explain it other than that they substituted the 50° angle into the original equation.
Answer:
$15.5
Step-by-step explanation:
let a = price of one orchid plant
8 orchids would cost 8 x a = 8a
12 orchids would cost 12 x a = 12a
Let b = price of one lily plant
12 lilies would cost 12 x b = 12b
8 lilies would cost 8 x b = 8b
8a + 12b = 362 -- eqn 1
12a + 8b = 388 -- eqn 2
to solve, multiply equation 1 by 8 and equation 2 by 12
64a + 96b = 2896 equation 3
144a + 96b = 4656 equation 4
substract equation 4 from 3
80a = 1760
a = $22
Substitute for a in eqn 1 and solve for b
8(22) + 12b = 362
b = $15.5
Answer:
77 and 7
Step-by-step explanation:
Let the number of books sold by Jessica be A and Josh be B.
Cost of one book = $20
Jessica sold 11 times Josh .
That’s A = 11B
Together they sold 84 books.
That’s A + B = 84
We now have two equations ,
Equation 1 : A = 11B
Equation 2: A + B = 84
Substitute 11B for A in equation 2.
We have ,
11B + B = 84
12B = 84
Divide both sides by 12
B = 84/12
B = 7
Josh sold 7 books
Now substitute 7 for B in either of the equations to get A. Using equation 1 , we have
A = 11B
A = 11 x 7
A = 77
Jessica sold 77 books while Josh sold 7
Hello there!
If Jessica uses 3 equal sizes for all three picture frames, and she only has 1/2 of a yard, one easier way that we can convert this would be that there are 0.5 = 18 inches of Ribbon.
18 ÷ 3 = 6 ... 6 × 3 = 18.
Your correct answer would be D. 6
Answer:42
Step-by-step explanation:
