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vovangra [49]
3 years ago
14

The formula for the perimeter of a rectangle is P=2(l+w).

Mathematics
2 answers:
juin [17]3 years ago
6 0
So we have:
P =2 ( l + w) 
We want to get 'l' by itself.
Next we have to divide both sides by 2 , since '( l + w )' is being multiplied by 2
 
P/2 = l + w

Next you by subtracting both sides by w to get 'l' alone

P/2 - w = l

So the answer is the first one.
podryga [215]3 years ago
3 0

The Opposite is w = p/2 - L

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I'm pretty sure your right. the answer is mantle.
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A bag of dog food contains 42 cups of dog food. Your dog eats 2 1/3 cups of dog food each day. How many days does the bag of dog
leva [86]

Answer: you keep adding 2 and 1/3 to get your answer. 18 day so the dog food should last up to 18days hope this helps

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K +-23 = -100<br>help me
Alex_Xolod [135]

Answer:

-77

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-77 + -23 = -100

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What is the solution of this equqtion? 4+ 1/4 w=6​
ale4655 [162]

Answer:

w = 8

Step-by-step explanation:

4+ 1/4 w=6​

Subtract 4 from each side

4-4+ 1/4 w=6​-4

1/4w = 2

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4* 1/4 w=2*4

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4 0
3 years ago
In a study of parents' perceptions of their children's size, researchers asked parents to estimate their youngest child's height
tatyana61 [14]

Answer:

Test statistic t=6.505

P-value=0

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that parents tend to underestimate their youngest child's size.

Then, the null and alternative hypothesis are:

H_0: \mu=0\\\\H_a:\mu> 0

The significance level is assumed to be 0.05.

The sample has a size n=39.

The sample mean is M=7.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=7.2.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{7.2}{\sqrt{39}}=1.153

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{7.5-0}{1.153}=\dfrac{7.5}{1.153}=6.505

The degrees of freedom for this sample size are:

df=n-1=39-1=38

This test is a right-tailed test, with 38 degrees of freedom and t=6.505, so the P-value for this test is calculated as (using a t-table):

P-value=P(t>6.505)=0

As the P-value (0) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is  enough evidence to support the claim that parents tend to underestimate their youngest child's size.

5 0
3 years ago
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