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3 years ago

A+4=48 vtdcvjyKBFHDAKu

Mathematics

1 answer:

Allushta [10]3 years ago

7 0

Step-by-step explanation:

a+4=48

a=48-4

a=44

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N=number A: n divided by 7 minus 10 B: n times 7 minus 10 C: 10 divided by 7 minus n D: n divided by 7 minus 10

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4 years ago

Please help!! And pls show work

coldgirl [10]

<h3>The answer to your question is k (-3) = 21!</h3>

Here's how I got this answer:

K(a) = 2a^2 - a

K(a) = 2a^2 - a K(-3) = 2(-3)^2 - (-3)

K(a) = 2a^2 - a K(-3) = 2(-3)^2 - (-3)K(-3) = 2(9) + 3

K(a) = 2a^2 - a K(-3) = 2(-3)^2 - (-3)K(-3) = 2(9) + 3K (-3) = 18 + 3

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I hope this helps!

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8 0

4 years ago

Which graph shows the solution to the system of linear inequalities y>1/3x+1, y>2x-3

ElenaW [278]

For this case we have the following system:

$y> \frac {1} {3} x + 1\\y> 2x-3$

To solve, we first change the inequality for an equality:

$y = \frac {1} {3} x + 1\\y = 2x-3$

Matching we have:

$\frac {1} {3} x + 1 = 2x-3\\\frac {1} {3} x-2x = -3-1\\- \frac {5} {3} x = -4\\\frac {5} {3} x = 4\\5x = 12\\x = \frac {12} {5}$

So:

$y = 2x-3\\y = 2 (\frac {12} {5}) - 3\\y = \frac {24} {5} -3\\y = \frac {9} {5}$

Thus, $(\frac {12} {5}, \frac {9} {5})$ is the point of intersection of the lines.

Answer:

The graphic is attached

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3 years ago

X – 4 = –7. A. x = 3 B. x = –3 C. x = 11 D. x = –11

irina [24]

Answer:

it is c

Step-by-step explanation:

i took the test

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3 years ago

Mattel Corporation produces a remote-controlled car that requires three AA batteries. The mean life of these batteries in this p

goldfiish [28.3K]

Answer:

0.0406, 0.8284,0.7887

Step-by-step explanation:

Given that Mattel Corporation produces a remote-controlled car that requires three AA batteries

X is N(34, 5.5)

Hence sample size of 25 would follow a t distribution with df = 24

This is because sample size <30

t distribution with df 24 would be bell shaped symmetrical about the mean and unimodal.

Std error of sample mean = std dev /sqrt n= $\frac{5.5}{5} \\=1.1$

Prob (X>36) = $P(t>\frac{36-34}{1.1} ) = P(t>1.82)\\= 0.04063$

i.e nearly 4.1% of the sample would have a mean useful life of more than 36 hours

X>33.5 implies $t>-0.45$

=0.82837

=0.8284 proportion will have a mean useful life greater than 33.5 hours

Proportion between 33.5 and 36 hours

= $0.3284+0.4593=0.7887$

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3 years ago