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2 years ago

I NEED THIS NOWW!!!!!!

Mathematics

2 answers:

miskamm [114]2 years ago

6 0

Check the picture below.

coming straight up from Dave's house at y=-12, up to y = 0 is 12 units, then we keep on going up up to y = 8, 12 + 8, so to get to John's house, is 20 units off the grid.

then they take off to the swimming pool, from x = -16, up to x = -4, what's that difference? is 12 units, | 16 - 4| = 12.

so, Dave went 20 units to John's house, and then 12 units to the swimming pool.

20 + 12, or 32 units.

borishaifa [10]2 years ago

6 0

(-16,-12) to (-16,8) is 20 units then from (-16,8) to (-4,8) is 12 units so 20+12= 32units

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Y=2x

Shalnov [3]

Step-by-step explanation:

By substitution method

6x+3(2x)=12

6x+6x =12

12x=12

x=1

y=2x

y=2*1

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7 0

2 years ago

a tank is 3/7 full of water.After removing 420 litres it became 12/35 full .how much can the tank hold when full?

insens350 [35]

Answer:

4900 Litres

Step-by-step explanation:

First we need a common demoninator:

3/7=15/35

Then we subtract the two to figure out how much 420 Litres is:

15/35-12/35=3/35

3/35=420 litres

Divide amount by the numerater for thow much 1/x is.

1/35=140

and multiply by the denomenator to get a full number on your fraction, and therefore a full tank.

140 x 35 = 4900

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1 year ago

Answer the question for a normal random variable x with mean μ and standard deviation σ specified below. (Round your answer to o

vladimir2022 [97]

Answer:

x = 63.6

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X and also the area to its left. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X, which is the area to its right.

In this problem, we have that:

$\mu = 38, \sigma = 11$