Answer
19
Step-by-step explanation:
For this example, R = Richard and L = Lilia. You'll need to set up a system of equations with the information that the problem gives you.
R = L + 7
(R+10) + (L+10) = 51
Use the substitution method so that you only have one variable in the equation. The first equation tells you that R is the same as L+7, so put L+7 instead of R everywhere you see R in the second equation.
[(L+7) + 10) + (L+10) = 51
L + 7 + 10 + L + 10 = 51
Combine like terms.
2L + 27 = 51
Isolate the variable by subtracting first, then dividing.
2L + 27 - 27 = 51 - 27
2L = 24
2L/2 = 24/2
L = 12
You just solved for L (Lilia's age). Don't forget that you're trying to find R (Richard's age), so plug your L number into the first equation.
R = L + 7
R = 12 + 7
R = 19
Check your answer by plugging your solutions (R and L) into the second equation and see if it's true.
(R+10) + (L+10) = 51
(19+10) + (12+10) = 51
29 + 22 = 51
51 = 51 is true.
Answer:
Step-by-step explanation:
There are 100 pence to the British note.
Using that, we can multiply the 5 notes by 100 to get 500 pence.
If each pen is 15 pence, we can just divide 500 by 15 to get about 33 pens he can buy, meaning that he has just enough money for 32 pens and some change because 33 is greater than 32.
Vote Brainliest, Thx :)
Answer:
pog champ
Step-by-step explanation:
Answer:
x=-7/5
Step-by-step explanation:
move all terms to the left and set to zero. then set each factor to zero
It has a 1:4 ratio I believe
