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3241004551 [841]
2 years ago
6

Khan academy question

Mathematics
2 answers:
AleksAgata [21]2 years ago
8 0

Answer:

(2, 5)

Step-by-step explanation:

y=2x+1

x-y=-3

x-(2x+1)=-3

x-2x-1=-3

-x-1=-3

-x=-3+1

-x=-2

x=2

y=2x+1

y=2(2)+1

y=4+1

y=5

andriy [413]2 years ago
4 0

Answer:

(2,5)

Step-by-step explanation:

There you go.........

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PLS HELP MATHH!!! FIVE STARS!!!
kaheart [24]

Answer:

True

Step-by-step explanation:

sry if it wrong

6 0
3 years ago
Discrete MathA coin is flipped four times. For each of the events described below, express the event as a set in roster notation
Vladimir79 [104]

Answer:

a) 25%

b) 50%

c) 87.5%

Step-by-step explanation:

There are 2^4 = 16 number of outcome in total.

a)First and last flips come up heads. There are 4 outcomes here. Probability of the event is 4/16 = 1/4, or 25%.

- HHHH

- HHTH

- HTHH

- HTTH

b) at least 2 Consecutive flips that is heads. There are 8 outcomes. Probability of event is 8/16 = 1/2, or 50%

- HHHH

- HHHT

- HHTH

- HHTT

- THHH

- THHT

- HTHH

- TTHH

c) At least 2 consecutive flips that are the same. There are 14 outcomes. Probability of 14/16 = 7/8, or 87.5%

- HHHH

- HHHT

- HHTH

- HHTT

- THHH

- THHT

- HTHH

- TTHH

- TTTT

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- TTHT

- HTTT

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6 0
2 years ago
Whats the most hardest thing
finlep [7]
Hardest thing like an object is metal.
Hardest thing like something someone struggles with is geometry.
4 0
3 years ago
Read 2 more answers
Indigo Depot is having a clearance sale of their summer items. A swimsuit that originally cost $90 before any discount is on sal
nekit [7.7K]

Answer:

$43.20

Step-by-step explanation:

A swimsuit that originally cost $90 before any discount is on sale for 20% off.

X = price of swimsuit

X = 90

20% off = 90 * 0.8 = 72

The swimsuit is then put on clearance for an additional 40 % off the sale price.

72 * 0.6 = 43.2

what is the final price?

$43.20

6 0
2 years ago
Read 2 more answers
In a survey, four out of five people surveyed preferred creamy over chunky peanut butter. 120 people are shopping at the grocery
elixir [45]

Answer: Around 96 people would prefer creamy peanut butter.

Step-by-step explanation:

In the survey was found that 4 out of 5 preferred creamy over chunky peanut butter.

Then the relative frequency is:

4/5 = 0.8 prefer creamy peanut butter.

And we can assume that:

1/5 = 0.2 prefer chunky peanut butter.

We also could multiply these numbers by 100% to obtain the percentage forms:

0.8*100% = 80%

0.2*100% = 20%

Now, if there are 120 people in the grocery store, we can expect that the 80% will prefer creamy peanut butter.

Then we can expect that the number of people that prefers creamy peanut butter is:

N = (80%/100%)*120 = 0.8*120 = 96

Around 96 people would prefer creamy peanut butter.

3 0
2 years ago
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