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3 years ago

I NEED HELP PLEASE!!! I'll give Brainliest Answer to whoever helps me!

Mathematics

1 answer:

Gennadij [26K]3 years ago

5 0

Answer:

1. 8/3

2. 1/9

Step-by-step explanation:

1. $18^{-4} *6^7= \frac{1}{18^{4}} *279936=\frac{1}{104976} *279936=\frac{8}{3}$

2. $3^4 * 3^{-6} * 9^0 = 81*\frac{1}{729} *1 =\frac{1}{9}$

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Please heeeeeelp meeeee

Pepsi [2]

Answer:

1) C

2)C

3)C

Step-by-step explanation:

in y=mx+b the

m is the slope, b is the y-intercept

y is the output, x is the input

1) The slope is -2 and y-intercept is 3

so y= -2x+3 which is C

2) Slope:6/5 and y-intercept is -4

so y= 6/5x-4 which is C

3) Slope: -1 and y-intercept is 2

You don't put 1x or -1x it's just x.

so y= -x+2 which is A

Hope this helps:)

5 0

4 years ago

What would be the easiest way to solve the system composed of the following two equations? 3=x+4y and 2x=-9

Alex_Xolod [135]

Answer:

The easiest way would be to try to solve for x

Step-by-step explanation:

7 0

3 years ago

7. carmen estimates that deductions from his gross pay will be 25%. assuming the weekly gross pay is $229.22, carmen can expect

daser333 [38]

nececito tus puntos perdon

8 0

3 years ago

Read 2 more answers

Solve |x|+7<4 <br><br> {x | x <-11 or x > -3}<br> {x | -3 < x < 3}<br> Ø

Blizzard [7]

Answer:

no solution

Step-by-step explanation:

4 0

3 years ago

A scientist studying water quality measures the lead level in parts per billion (ppb) at each of 49 randomly chosen locations al

NeX [460]

Complete Question

The complete qustion is shown on the first uploaded image

Answer:

The correct option is B

Step-by-step explanation:

From the question we are told that

The sample size is $n = 49$

The mean is $\mu = 17ppb$

The standard deviation is $\sigma = 14 ppb$

Generally the standard error of this measurement is mathematically represented as

$\sigma_z = \frac{\sigma}{\sqrt{n} }$

substituting values

$\sigma_{\= x} = \frac{14}{\sqrt{49} }$

$\sigma_{\= x} = 2$ ppb

Now the probability that the mean lead level from the sample of 49 measurements T is less than 15 ppb represented as P(X < 15 )

Next is to find the z value

$z = \frac{\mu -\sigma }{\sigma_{\= x}}$

$z = \frac{15-17}{2}$

$z = -1$

Now checking the z-table for the z-score of -1 we have

$P(X$

5 0

4 years ago