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1 year ago

Is (10,4),(-2,4),(-1,1),(5,6) a function?

Mathematics

1 answer:

lys-0071 [83]1 year ago

7 0

No it is not a function.

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2x+ky=7 and 4x-9y=4 find value of k if matrix of coefficients is singular

lesya [120]

Hello,

| 2 k|
|4 -9 |=6

==>2*(-9)-4*k=0
==>k=-9/2

5 0

3 years ago

What is the factored form of 3x+24?

Ket [755]

Answer:

3(x+8)

Step-by-step explanation:

3 0

3 years ago

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a student ran out of time on a multiple choice exam and randomly guess the answers for two problems each problem have four answe

katen-ka-za [31]

Answer:

The probability that he answered neither of the problems correctly is 0.0625.

Step-by-step explanation:

We are given that a student ran out of time on a multiple-choice exam and randomly guess the answers for two problems each problem have four answer choices ABCD and only one correct answer.

Let X = Number of problems correctly answered by a student.

The above situation can be represented through binomial distribution;

$P(X=r)=\binom{n}{r}\times p^{r}\times (1-p)^{n-r};x=0,1,2,3,....$

where, n = number of trials (samples) taken = 2 problems

r = number of success = neither of the problems are correct

p = probability of success which in our question is probability that

a student answer correctly, i.e; p = $\frac{1}{4}$ = 0.75.

So, X ~ Binom(n = 2, p = 0.75)

Now, the probability that he answered neither of the problems correctly is given by = P(X = 0)

P(X = 0) = $\binom{2}{0}\times 0.75^{0}\times (1-0.75)^{2-0}$

= $1 \times 1\times 0.25^{2}$

= 0.0625

6 0

4 years ago

A flagpole is 20 feet tall is casting a shadow that is 8.2 feet long at what angle is the sun hitting the ground

Novay_Z [31]

Answer:

∅ = 67.71°

Step-by-step explanation:

The flag pole is 20 ft tall is casting a shadow that is 8.2 ft long .At what angle is the sun hitting the ground. The illustration forms a right angle triangle.

The right angle triangle has an hypotenuse, opposite and adjacent sides. The flag height forms the opposite side. The shadow forms the adjacent side . The angle the sun is hitting the ground can be using SOHCAHTOA principle.

using Tan

tan ∅ = opposite / adjacent

tan ∅ = 20/8.2

tan ∅ = 2.4390243902

∅ = tan⁻¹ 2.4390243902

∅ = 67.7063708403

∅ = 67.71°

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3 years ago

I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER

emmainna [20.7K]

Step-by-step explanation:

area (S) = base x height, so 2.7 × 7.3 which would be 19.71 inch²

4 0

2 years ago

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