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4 years ago

??? Anyone I need help

Mathematics

1 answer:

Schach [20]4 years ago

4 0

Answer b

Because -2-5 adds -5 to it equals -7

If you have any questions about answer just ask

And please give brainliest

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6) f(x) = 2x - 1, g(x) = 3x + 7<br>Find (fg)(x).

amid [387]

Answer:

$\boxed{\sf \ \ \ 6x^2+11x-7 \ \ \ }$

Step-by-step explanation:

Hello,

$(fg)(x)=f(x)*g(x)=(2x-1)(3x+7)=2x(3x+7)-(3x+7)=6x^2+14x-3x-7\\=6x^2+11x-7$

hope this helps

3 0

3 years ago

Traveling at 65 miles/hour, how many feet can you travel in 22 minutes?

alexdok [17]

This is what's called a unit rate problem.

someone is going at 65 miles per hour, and you must find the distance in feet in 22 minutes. I think I know what chart you're talking about. I'm going to try to write it here, I don't know if it will appear the way I want it to

65 miles | 1 hour | 5280 feet | ----------------------------------------------- hour | 60 minutes| Mile| Now multiply the fraction out. Anytime a unit appears on both the top and bottom, it cancels, so miles and yours cancel. You end up with 343200 feet/ 60 minutes (all I did was multiply 65 by 5280 and add the remaining units and the denominator. The easiest way to get to your final answer is get the number of feet in one minute, so divide 343200 by 60 and you get 5720 feet/ min. To get the final answer, all you now have to do is multiply by 22 minutes to get 125840 feet.

6 0

4 years ago

Read 2 more answers

A quality control inspector has drawn a sample of 10 light bulbs from a recent production lot. Suppose 20% of the bulbs in the l

Neko [114]

Answer:

The probability is 0.0008.

Step-by-step explanation:

Let X represents the event of defective bulb,

Given, the probability of defective bulb, p = 20 % = 0.2,

So, the probability that bulb is not defective, q = 1 - p = 0.8,

The number of bulbs drawn, n = 10,

Since, binomial distribution formula,

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

Where, $^nC_r = \frac{n!}{r!(n-r)!}$

Hence, the probability that exactly 7 bulbs from the sample are defective is,

$P(X=7)=^{10}C_7 (0.2)^7 (0.8)^{10-7}$

$=120 (0.2)^7 (0.8)^3$

$=0.000786432$

$\approx 0.0008$

6 0

3 years ago

A carpenter's tool box is made up of nails, screws,

DanielleElmas [232]

Answer:

45 total washers

Step-by-step explanation:

Looking at the ratio of 4:11:9:6, we know that there are,

4 nails in each tool box

11 screws in each tool box

9 washers in each tool box

6 brackets in each tool.

Given that there are 5 carpenters with identical tool boxes, we can find the total amount of washers by multiplying the amount of washers in each box with how many carpenters there are.

9 * 5 = 45

7 0

3 years ago

Read 2 more answers

Simplify the expression if possible by combining like terms 9(X+5)+7(X-3)

IceJOKER [234]

So you do
distribute
a(b+c)=ab+ac
9(x+5)=9x+9 times 5=9x+45

7(x-3)=7x+7 times -3=7x-21

so now we have
9x+45+7x-21
group like terms
9x+7x+45-21
add
16x+24

simplified is 16x+24

7 0

4 years ago