2 years ago

Can someone pls help me

Mathematics

1 answer:

harina [27]2 years ago

3 0

Answer:

16:8 2:1

Step-by-step explanation:

it's both 8 and 4 times 2 on each side, and then divided on each side

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Solve for a. 7a + 18 = 102

Oliga [24]

Answer:

a=12

Step-by-step explanation:

7a+18=102

7a=102-18

7a=84

a=84/7

a=12 <----- answer

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2 years ago

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My question is how would I be able to write me equation?

guapka [62]

Wouldn’t that just be 325m=c

Then for the second part it’s just 325(7)=c

Multiply 325 times 7 and that’s the answer

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2 years ago

A recent poll of 80 randomly selected Californians showed that 38% ( = 0.38) believe they are doing all that they can to conserv

Elanso [62]

The margin of error given the proportion can be found using the formula

$z* \sqrt{ \frac{p(1-p)}{n} }$

Where
$z*$ is the z-score of the confidence level
$p$ is the sample proportion
$n$ is the sample size

We have
$z*=2.58$
$p=0.38$
$n=80$

Plugging these values into the formula, we have:
$2.58 \sqrt{ \frac{0.38(1-0.38)}{80} } =0.14$

The result 0.14 as percentage is 14%

Margin error is 38% ⁺/₋ 14%

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2 years ago

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How many teams does the dentist sell each mounth

charle [14.2K]

Answer:

Toothbrushes: 100

Floss: 1050

Step-by-step explanation:

to find the number of toothbrushes, you multiply 50*20....to get the floss you multiply 15*70

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2 years ago