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3 years ago

7

PLEASEEEEEEE HEEELLLLPPPPP MEEE

1 answer:

Aleks04 [339]3 years ago

3 0

Answer:

The second option

Step-by-step explanation:

For this problem, there are multiple ways to solve. The easiest here is the cross method. For ax²+bx+c, you find 2 numbers that multiply to ac and add to b, which you replace b with.

ac in this case is -8×3, which is -24. b in this case is 23.

You can go through the factor pairs of -24 to find the ones that add to b. These pairs are (1 and -24, -1 and 24, 2 and -12, -2 and 12, 3 and -8, -3 and 8, 4 and -6, -4 and 6). The only pair that adds to 23 is 24 and -1.

You sub this into the original equation, making 3x²+24x-x-8.

From there, you factorise, making 3x(x+8)-x(x+8).

This can be factorised further to (3x-x)(x+8) by collecting like terms.

**This question involves factorising quadratics, which you may wish to revise. I'm always happy to help!

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A company did a quality check on all the packs of trail mix it manufactured. Each pack of trail mix is targeted to weigh 9.25 oz

pashok25 [27]

Each pack of trail mix is targeted to weigh 9.25 oz.

A pack must weigh within 0.23 oz of the target weight to be accepted.

Let the weight of the pack x

The range of accepted weight will be as following:

∴ 9.25 - 0.23 < x < 9.25 + 0.23

subtract 9.25 from all sides

∴ -0.23 < x - 9.25 < 0.23

which can be written as ⇒⇒⇒ | x - 9.25 | < 0.23

So, the rejected weight is the inverse of that inequality.

∴ The absolute value inequality for the rejected weight range is:

<u>| x - 9.25 | > 0.23</u>

=====================================

So, the range of rejected masses: <u>x < 9.02</u> OR <u>x > 9.48</u>

4 0

4 years ago

Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error:

Yakvenalex [24]

Answer: 112

Step-by-step explanation:

Given : Significance level : $\alpha=1-0.95=0.05$

Critical value: $z_{\alpha/2}=1.96$

Margin of error : E = 9%=0.09

The estimated proportion of caret : p =0.38

Now, the formula to find the sample size :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

i.e. $n=(0.38)(1-0.38)(\dfrac{1.96}{0.09})^2$

$=111.738390123\approx112$

Hence, the required minimum sample size = 112

6 0

3 years ago

32 is 40% of what number? please show working.

blagie [28]

32 40%
80 100

to find the answer, you do 32 times 100, the. divide that by 40 which equals 80

6 0

3 years ago

Ronaldo scores approximately one goal every 98 minutes. If he scored 42 goals, about how many minutes did he play for?

Sliva [168]

Answer:

He spent about 68.6 hours or 4116 minutes

Step-by-step explanation: If my math is totally off sue me

5 0

3 years ago

What is the fraction for 33%<br> decimal for 33%

svp [43]

$Question$

what is the fraction for 33%and the decimal for 33%?

Answer:

Your Answer Would Be $\frac{33}{100}$ For your Fraction And For your Decimal It Would Be 0.33

Hope this Helps!

$xXxAnimexXx$

6 0

3 years ago