Ask question

Ask question

All categories

4 years ago

13

If a spider has 8 legs and dragonflies have 6 legs. 28 spiders and dragonflies have 200 legs altogether. How many spiders are th

ere? How many dragonflies are there?

1 answer:

disa [49]4 years ago

4 0

Hopefully my answer helped you!

You might be interested in

2. Write the slope-intercept form of the equation of the line described.

yanalaym [24]

Answer:

y = -x + 1

Step-by-step explanation:

We're putting it into the form y=mx+b where m is the slope, and b is the y-intercept.

When two lines are parallel, they have the same slope, so the slope is going to be -1.

New equation: y = -x + b.

Now, you know that (4, -3) is a solution so you can plug in x = 4 and y = -3, then see what value of b make the equation true.

-3 = -4 + b

add 4 to both sides

1 = b

This means that the equation is y = -x + 1

8 0

3 years ago

If a spider can move 1/2 of a mile every hour, then how many hours would it take for a

SVETLANKA909090 [29]

Answer:

2

Step-by-step explanation:

1/2x4=2

8 0

3 years ago

What is the answer to <br> -11z-4+6z+5

Annette [7]

Answer:

-5z+1

Step-by-step explanation:

-11z-4+6z+5

-11z+6z-4+5

-5z+1

8 0

3 years ago

The company you work for deposits money into your retirement fund. this is an example of

kiruha [24]

Answer:

Employee benefit

Step-by-step explanation:

3 0

3 years ago

In January 2002, two students made worldwide headlines by spinning a Belgian euro 250 times and getting 140 heads—that’s 56%. Th

natita [175]

Answer with explanation:

The 90% confidence interval (51%, 61%) for proportion means that the proportion of getting heads lie in it.

Given : Total number of times coin is tossed = 250

Number of times they got head =140

The probability of getting a head = 0.56

The confidence interval for proportion is given by :-

$p\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}$

Given significance level : $\alpha=1-0.90=0.1$

Critical value : $z_{\alpha/2}=z_{0.05}=\pm1.645$

Now, the 90% confidence interval for proportion will be :-

$0.56\pm (1.645)\sqrt{\dfrac{0.56(1-0.56)}{250}}\approx0.56\pm 0.0516\\\\=(0.56-0.0516,0.56+0.0516)=(0.5084,\ 0.6116)\approx(51\%,\ 61\%)$

Hence, the given confidence interval is correct.

6 0

3 years ago