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2 years ago

14

Y = 2x + 7 a) Work out the value of y when x=4 b) Work out the value of y when x=-3

1 answer:

creativ13 [48]2 years ago

6 0

A ) y = 2(3) + 7
y = 15

b ) y = 2(-3) + 7
y = 1

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What is pythagoras triplets?

dedylja [7]

A pythagoras triplet is a set of three numbers ... not just any three numbers,
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If they're related in that way, then they can be the lengths of the sides of a
right triangle.

If they're not, then they can't.

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2 years ago

Help me please, I’ve been stuck on this. :(

maxonik [38]

Answer: 0.98 cents

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First you want to get the amount of apples to one pound.

3.5 to 1

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2 years ago

It says solve for x and round to the nearest hundredth. <br> 1. 9 over 6 equals x over 10

emmainna [20.7K]

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Step-by-step explanation:

I hope that help's

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2 years ago

Angel is x years old, in 15 years how old will Angel be?

Verizon [17]

The age would increase by 15 years that is, x+15

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2 years ago

In a study, 36% of adults questioned reported that their health was excellent. A researcher wishes to study the health of peop

steposvetlana [31]

Answer:

0.3907

Step-by-step explanation:

We are given that 36% of adults questioned reported that their health was excellent.

Probability of good health = 0.36

Among 11 adults randomly selected from this area, only 3 reported that their health was excellent.

Now we are supposed to find the probability that when 11 adults are randomly selected, 3 or fewer are in excellent health.

i.e. $P(x\leq 3)=P(x=1)+{P(x=2)+P(x=3)$

Formula : $P(x=r)=^nC_r p^r q ^ {n-r}$

p is the probability of success i.e. p = 0.36

q = probability of failure = 1- 0.36 = 0.64

n = 11

So, $P(x\leq 3)=P(x=1)+{P(x=2)+P(x=3)$

$P(x\leq 3)=^{11}C_1 (0.36)^1 (0.64)^{11-1}+^{11}C_2 (0.36)^2 (0.64)^{11-2}+^{11}C_3 (0.36)^3 (0.64)^{11-3}$

$P(x\leq 3)=\frac{11!}{1!(11-1)!} (0.36)^1 (0.64)^{11-1}+\frac{11!}{2!(11-2)!} (0.36)^2 (0.64)^{11-2}+\frac{11!}{3!(11-3)!} (0.36)^3 (0.64)^{11-3}$

$P(x\leq 3)=0.390748$

Hence the probability that when 11 adults are randomly selected, 3 or fewer are in excellent health is 0.3907

5 0

2 years ago