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Black_prince [1.1K]
3 years ago
8

Which equation shows the value of -2/5 - -9/15

Mathematics
1 answer:
Alika [10]3 years ago
6 0

Answer:

D) 3/15

Step-by-step explanation:

(-2/5) - (-9/15) = (-6/15) - (-9/15) = (-6/15) + (9/15) = 3/15

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Help please i really really really need it.....
ruslelena [56]

A)

s = sweater

j = jeans

Equations:

4s + 2j = 140

2s + 3j = 150

B)

4s + 2j = 140

2s + 3j = 150

Multiply (-2) to the second equation

-2 (2s + 3j = 150)

-4s - 6j = -300

Now you have the equations:

4s + 2j = 140

-4s - 6j = -300

-----------------------------add

-4j = -160

  j = 40

4s + 2(40) = 140

4s + 80 = 140

4s = 60

 s = 15

The cost for a sweater is $15 and the cost for a jean is $40

We used the elimination method to solve the system of equations.

C)

Each pair of jean, she will buy 3 sweaters so total = 40 + 3(15) = $85

Total cost for 1 pair of jeans and 3 sweaters = $85

If she has $225 the

$225 / $85 = 2.64

2 jeans = 2 x 40 = $80

6 sweaters = 6 x $15 = $90

So She can only buy 2 jeans and 6 sweaters

3 0
3 years ago
I will give brainlest
AfilCa [17]
1. X + 5
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An item Brophy Burger costs n dollars. If the price of the Brophy Burger increases by 30%, the new price can be represented by t
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A video game randomly chooses your car color and type. The probability of getting a red car is 0.25, and the probability of gett
EleoNora [17]

In probability 2 events are independent if the occurrence of 1 event does not affect the occurrence of the other event. Mathematically, if event A and event B are independent, then P(A\&B)=P(A)\times P(B). For our two events in this problem we have that P(A)=0.25 and P(B)=0.40. If these two events are independent, then we should have that,

P(A\&B)=P(A)\times P(B)\\P(A\times B)=0.25\times 0.4=0.1.

.A and B are independent events if the probability of A and B is 0.1

6 0
3 years ago
Read 2 more answers
What is the decimal expansion of the following fraction? 1/8 A. 0.125 B. 0.125 C. 1.8 D. 0.18​
qaws [65]

Answer:

0.125....................

3 0
3 years ago
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