1.jenny owns about there times as many books as Carly. Jamie owns 42 books. write an equation and use it to estimate the number n of books Carly owns.
a 3 n= 42; about 14 books
b n + 2 = 42; about 40 books
c n divided 3 = 42; about 126 books *****my answer
d n - 2 = 42; about 44 books
2. - 13x = -78
a 6
b -6
c 1,014
d -1,014
solve
3. r/7 = -8
a -56
b - 7/8
c 56
8
d - ----
7
1C
2A
3A
You did a good job on #1; I'm surprised that the others bothered you.
1. The correct answer is option C.
To find the estimated number of books Carly owns, we can set up the equation:
3n = 42
Dividing both sides of the equation by 3, we get:
n = 42 / 3
Simplifying, we find:
n ≈ 14
So, Carly owns approximately 14 books.
2. To solve the equation, we need to isolate the variable x.
-13x = -78
Dividing both sides of the equation by -13, we get:
x = -78 / -13
Simplifying, we find:
x = 6
So, the correct answer is option A.
3. To solve the equation, we need to isolate the variable r.
r/7 = -8
Multiplying both sides of the equation by 7, we get:
r = -8 * 7
Simplifying, we find:
r = -56
So, the correct answer is option A.
1. To solve the first problem, we need to write an equation representing the relationship between the number of books Jenny and Carly own. We are given that Jenny owns about three times as many books as Carly, and Jamie owns 42 books.
Let's denote the number of books Carly owns as n. According to the given information, Jenny owns about three times as many books as Carly, so the number of books Jenny owns can be expressed as 3n.
Now we can set up the equation: 3n = 42.
To estimate the number of books Carly owns, we need to solve this equation by isolating n. Divide both sides of the equation by 3: n = 42/3.
Simplifying this expression, we find n = 14. Therefore, Carly owns about 14 books.
The correct answer is option a.
2. To solve the equation -13x = -78, we need to isolate x. Divide both sides of the equation by -13: x = -78 / -13.
Simplifying the expression, we find x = 6. Therefore, the value of x that satisfies the equation is 6.
The correct answer is option a.
3. To solve the equation r/7 = -8, we need to isolate r. Multiply both sides of the equation by 7: 7 * (r/7) = -8 * 7.
Simplifying, we find r = -56. Therefore, the value of r that satisfies the equation is -56.
The correct answer is option a.