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4 years ago

Is -15 a whole number, integer, or a rational?

Mathematics

2 answers:

Crazy boy [7]4 years ago

8 0

Answer: Integer and rational

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Explanation:

The set of whole numbers is defined to be {0, 1, 2, 3, ....} so it's composed of numbers that don't have any decimal or fractional components. We start at 0 with this set. We don't include negative numbers here.

Integers are basically the same as whole numbers, but now we include negative values {..., -3, -2, -1, 0, 1, 2, 3, ...} so we see that -15 is in the set of integers.

The value -15 is also a rational number because -15 = -15/1, meaning we can write -15 as a fraction of integers. Any rational number is of the form a/b with a,b being integers and b is nonzero.

Nataly [62]4 years ago

4 0

Answer:

rational

Step-by-step explanation:

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There are 10 cranberry and 15 strawberry juices. You randomly pick two juices. What's the probability you'll get two strawberry

lorasvet [3.4K]

Answer:

7/20

Explanation:

The theoretical probability, P (A), of an event, A, is:

P(A) = number of outcomes of event A / total number of possible outcomes

For 10 cranberry and 15 strawberry juices, the number of outcomes for two strawberry juices are:

Combination of 15 strawberry juices chosen in two:

$C^{15}_{2}=\frac{15!}{(15-2)!(2!)}=\frac{15!}{13!2!}=\frac{15\times 14}{2}=105$

The total number of possible outcomes is:

Combination of 25 juices chosen in two:

$C^{25}_{2}=\frac{25!}{(25-2)!(2!)}=\frac{25!}{23!2!}=\frac{25\times 24}{2}=300$

Thus, the probability of randomly picking two strawberry juices is:

P (two strawberry juices) = 105/300 = 7/20

Note that you can obtain it as the product of the probabilities that the first juice is a strawberry juice and the second juice is also strawberry juice:

$15/25\times 14/24=(15\times 25)/(14\times 24)=210/600=7/20$

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3 years ago

What is an equation of the line that passes through the points (4,4) and (8.1)

andrey2020 [161]

Answer:

y = - 3/4x + 7

Step-by-step explanation:

<u>Use both points and find the slope:</u>

m = (1 - 4) / (8 - 4) = - 3/4

<u>Find the line, using point-slope form and point (4, 4):</u>

y - 4 = - 3/4(x - 4)
y - 4 = - 3/4x + 3
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3 years ago

Jaylen earns $4250 each month at his job. At this rate, how much will he

dezoksy [38]

Answer:

Step-by-step explanation:

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2 years ago

Solve for the missing variable.

tigry1 [53]

There wasn't much to go off of but based of the information you've gave me the answer would be 7.68=6.28

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3 years ago

Read 2 more answers

Complete the square on the following quadratic x2+10x+9=0

kakasveta [241]

Given a quadratic equation $x^{2} +ax+c=0$

1. the first thing we do when we want to compete the square, is write the coefficient of x as 2 times a number.

In our case the coefficient of x is 10, so we write 10 as 2*5

2. then we write + $5^{2}$ and - $5^{2}$ to the expression:

$x^{2} +2*5*x+ 5^{2} -5^{2}+9=0$

$(x^{2} +2*5*x+ 5^{2}) -25+9=0$

$(x+5)^{2}-16=0$

Answer: $(x+5)^{2}-16=0$

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3 years ago