La cinema pe primul rand sunt 20 de locuri

Janet is three years older than her sister Julie Janet's brother is 8 years older than their sister Julie the sum of all their a

seropon [69]

Answer:

Julie is 14.67, Janet 17.67 and Brother 22.66

Step-by-step explanation:

Let Julie age be x

Janet: x+3

Brother: x+8

x+x+3+x+8=55

3x+11=55

3x=44

x=14.7

4 0

2 years ago

Kyung bought 3 CDs that cost x dollars each, 2 DVDs that cost $10 each; and a book that cost $15. Write an expression in simples

Diano4ka-milaya [45]

Answer:

Step-by-step explanation:

3x + 2·10 + 1·15 = (3x + 35) dollars

8 0

3 years ago

If f(x) = 4x + 3 and g(x) = 3x, evaluate for X = -1/2

miskamm [114]

Answer:

$f(-\frac{1}{2}) = 1$

$g(-\frac{1}{2} ) = -\frac{3}{2}$

Step-by-step explanation:

Given the function $f(x) = 4x + 3$ and the function $g(x) = 3x$ , to evaluate for $x=-\frac{1}{2}$ , you need to substitute it into each function.

Then, for the function f(x), when $x=-\frac{1}{2}$ , you get:

$f(-\frac{1}{2}) = 4(-\frac{1}{2}) + 3$

$f(-\frac{1}{2}) = -\frac{4}{2}+ 3$

$f(-\frac{1}{2}) = -2 + 3$

$f(-\frac{1}{2}) = 1$

For the function g(x), when $x=-\frac{1}{2}$ , you get:

$g(-\frac{1}{2} ) = 3(-\frac{1}{2})$

$g(-\frac{1}{2} ) = -\frac{3}{2}$

4 0

3 years ago

Read 2 more answers

If f(x) = 0.8(2 – x), what is the value of f(–2)?

Sergio039 [100]

With functions, you take the number that is in the ( ), so we have f(-2), and take the fomula f(x) = 0.8(2 – x) and everywhere you see an 'x' replace it with the -2 f(–2)=0.8(2 – (-2))

We will have to work with the expression of 0.8(2-(-2) When you want to evaluate these types of expressions, you want to use the Order of Operations: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction. First we have to evaluate the parentheses. What is 2-(-2)
its 4.

ok now you got 0.8 (4)

Now we have the remains of 0.8(4). If a number is within the parenthesis, then it means that we have to multiply the number inside with the number that is outside. What is 0.8*4 its 3.2 soooo your answer is going to be

3.2

5 0

4 years ago

Me.Pete is building a rectangular fence around his house.The fence will be 32 feet long and 29 feet wide.What will be the perime

Bad White [126]

Answer:

122

Step-by-step explanation:

32+32+29+29=122

3 0

3 years ago