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2 years ago

Can someone please help me with this?

Mathematics

1 answer:

Galina-37 [17]2 years ago

3 0

1. yes

2. yes

3. no

4. no

5. yes

6. yes

7. 3,0,2

8. 10,7,5

9. 1,-2,0

10. 9,0,-6

11. 11,-1,-9

12. 36,0,-24

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Use a mutiplication strategy to solve 12x12.

Arisa [49]

Answer:

144

Step-by-step explanation: Hope this helps

3 0

3 years ago

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Suppose a candy connoisseur opened a random bag of candy and found that 15 of the 62 candies were red. Using this information, d

Yakvenalex [24]

Answer: E= 0.107

Step-by-step explanation:

Formula to find the margin of error : $E=z^*\sqrt{\dfrac{p(1-p)}{n}}$

, where n= sample size .

p= sample proportion

z* = critical value.

Given : Sample size : n= 62

Number of red candies out of 62 = 15

Proportion of red candies = $p=\dfrac{15}{62}\approx0.242$

We know that , the critical value for 95% confidence = z*= 1.96 [Using z-table]

Then,

$E=(1.96)\sqrt{\dfrac{0.242(1-0.242)}{62}}$

$E=(1.96)\sqrt{\dfrac{0.242(0.758)}{62}}$

$E=(1.96)\sqrt{\dfrac{0.183436}{62}}$

$E=(1.96)\sqrt{0.00295864516129}$

$E=(1.96)(0.0543934293945)$

$E=0.106611121613\approx0.107$

Hence, the margin of error = E= 0.107

4 0

3 years ago

I’d appreciate the help!

Elis [28]

Answer:

$\displaystyle 1\frac{119}{250}\:liter$

$\displaystyle 7,5\:sleps$

$\displaystyle 37,3\:sleps$

Step-by-step explanation:

$\displaystyle 1\frac{119}{250} = \frac{1476}{1000}$

$\displaystyle 1\frac{1}{13} \times 7 = 7\frac{7}{13} ≈ 7,538461538 ≈ 7,5$

$\displaystyle \frac{41}{1\frac{1}{10}} = 37\frac{3}{11} ≈ 37,3$

I am joyous to assist you anytime.

4 0

3 years ago

An old railroad car was able to haul one days worth of coal in 15 hours the new railroad car only takes 10 hours because of high

masha68 [24]

Step-by-step explanation:

Old Railroad Car:

1 day of coal in 15 hours
1/15 days of coal in 1 hour

New Railroad Car:

1 day of coal in 10 hours
1/10 days of coal in 1 hour

Total number of days of coal in 1 hour

= 1/15 + 1/10 = 1/6.

Since there is 1/6 days of coal in 1 hour,

there will be 1 day of coal in 6 hours.

It will take them 6 hours to transport the supply.

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3 years ago

2x + 3y = 13<br> 4x - y = -2

Mama L [17]

Answer:

x=1/2. y=4

Step-by-step explanation:

4(2x+3y=13)=8x+12y=52

2(4x-y=-2)=8x-2y=-4

subtract equation one from equation two to get

14y=56 then u will divide bothe sides by 14. for x u substitute y in equation one

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4 years ago

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Can someone please help me with this?​

Can someone please help me with this?