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fredd [130]
3 years ago
8

PLEASE HELP!!

Mathematics
1 answer:
zepelin [54]3 years ago
6 0
He worked 31 hours
He earned $317.75
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The ratio of red cars to blue cars in a parking lot was 5:3 . If there was 40 red cars , how many blue cars were there ?
Bas_tet [7]
The answer is x equals 24
you set up a proportion new over old
so for red cars 40 over 5
since we don’t know the new for blue cars we’ll use x
so x over 3
we then make them equal to each other
40 x
—- = —-
5 3
cross multiply, then we get
120=5x
isolate the x by dividing 5 from both sides to get 24
5 0
3 years ago
If x = 5 & y = 3 what is 3x + 5y?
notka56 [123]

Answer:

30

Step-by-step explanation:

If you plug in 5 for x and 3 for y then the equation would be 3(5)+5(3) or 15+15.

4 0
2 years ago
How many solutions does this equation have? d − 3 = –3 + d
Tomtit [17]
It has an infinite amount of solutions.

Explanation:
d-3 = -3+d which can be arranged as: d-3=d-3
Since they are equal to each other, no matter what number you input, your solution will be the same which means that there are an infinite amount of solutions. Let’s put this to the test and put in 5 for d. 5-3=5-3 is 2=2. They are equal to each other which means: infinite solution.
4 0
3 years ago
Match each equation on the left to the mathematical property it uses on the right.
erma4kov [3.2K]

Answer:

The answer to your question is:

Step-by-step explanation:

(4 + 5) + 2 = 4 + (5 + 2)                     Associative property of addition

2(2x + 4) = 4x + 8                             Distributive property

( 7 x ) 3 = 7 (x 3)                                Associative property of multiplication

( 8 x 2) = (x 8 2)                                Commutative property of multiplication

( 7 + 3) + 1 = 1 + (7 + 3)                       Commutative property of addition

6 0
3 years ago
Read 2 more answers
A continuous random variable may assume :
vova2212 [387]

Answer:

Option A) any numerical value in an interval or collection of intervals

Step-by-step explanation:

Continuous Random Variable:

  • A continuous random variable can take any value within an interval.
  • Thus, it can take infinite values since there are infinite numbers in an interval.
  • A continuous variable is a variable whose value is obtained by measuring.
  • Examples: height of students in class , weight of students in class, time it takes to get to school, distance traveled between classes.
  • Thus, the correct meaning of continuous random variable is explained by Option A)

Option A) any numerical value in an interval or collection of intervals

6 0
3 years ago
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