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2 years ago

2.5x=-10 what is the answer

Mathematics

2 answers:

Nadya [2.5K]2 years ago

7 0

Answer:x=-4

Step-by-step explanation:

2.5x=-10

You will divide both sides by 2.5

2.5x/2.5= -10/2.5

x=-4

Maru [420]2 years ago

4 0

Answer: -4

Step-by-step explanation:

2.5x = -10

1. divide -10 by 2.5

2. x = -4

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geniusboy [140]

It will go in 44 times

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3 years ago

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At a college, 72% of courses have final exams and 46% of courses require research papers. Suppose that 32% of courses have a res

Ghella [55]

Answer:

a) $P(F UR) = P(F) +P(R) -P(F and R) = 0.72+0.46-0.32=0.86$

b) $P(FUR)' = 1-P(FUR)= 1-0.86 = 0.14$

Step-by-step explanation:

Let's define the following events first:

F: The event that a course has a final exam.

R: The event that a course requires a research paper

From the info provided we have that:

$P(F) = 0.72, P(R) =0.46$ P(F and R) =0.32

So then we can create a Venn diagram as we can see on the figure attached.

a. Find the probability that a course has a final exam or a research project.

For this case we can find the probability like this:

$P(F UR) = P(F) +P(R) -P(F and R) = 0.72+0.46-0.32=0.86$

b. Find the probability that a course has NEITHER of these two requirements.

For this case we can use the complement rule and we can find the probability like this:

$P(FUR)' = 1-P(FUR)= 1-0.86 = 0.14$

And that's the same value obtained with the diagram.

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3 years ago

Please Help............

crimeas [40]

Answer: number 1

Step-by-step explanation:

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3 years ago

Which expression is a difference of cubes?

Tanzania [10]

Answer:

Option 4 is correct.

Step-by-step explanation:

Given the following options

we have to choose the difference of cubes.

Option 1:

$9w^{33}-y^{12}$

$9(w^{11})^{3}-(y^4)^3$

which is not the difference of cubes

Option 2:

$18p^{15}-q^{21}$

$18(p^5)^3-(q^7)^3$

which is not the difference of cubes

Option 3:

$36a^{22}-b^{16}$

$(6a^{11})^2-(b^8)^2$

which is the difference of square

Option 4:

$64c^{15}-a^{27}$

$(4c^5)^3-(a^9)^3$

which is the difference of cubes.

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3 years ago

1,8,27; 64; Rule Missing numbers

zubka84 [21]

Answer:

rule: f(n) = n³

missing numbers: 125, 216, 343, 512, 729

Step-by-step explanation:

Your familiarity with the cubes of small integers helps you recognize each of these numbers is a cube. Their sequence is the sequence of cubes of increasing natural numbers.

1 = 1·1·1 = 1³

8 = 2·2·2 = 2³

27 = 3·3·3 = 3³

64 = 4·4·4 = 4³

The rule is ...

f(n) = n³

The cubes of 5 through 9 will complete the set of numbers ...

1, 8, 27, 64, 125, 216, 343, 512, 729

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2 years ago