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2 years ago

PLEASE HELP ME FOR BRAINLIEST!!!!

Mathematics

1 answer:

Alex777 [14]2 years ago

8 0

Measurements of lines:
CA= 16 yards
CB= 25 yards (rounded from 25.016)
BA= 33 yards

measurements of angles:
A: 47° (rounded from 47.074°)
B: 28° (rounded from 27.926°)
C: 105°

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Clarissa helps her mom put the 200-Newton lawn mower in the back of her mom’s truck. They lift the mower up from the ground to t

Anarel [89]

Answer:

220 N * m or 220 J

Step-by-step explanation:

We have that the work formula would be the applied force multiplied by the distance traveled, that is:

W = F * d

In this case the F is 200 N and the distance is 1.1 meters, therefore we replace:

W = 200 * 1.1

W = 220 N * m = 220 J

Therefore the work carried out by Clarissa and her mom is 200 joules.

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2 years ago

P=21+2w; if p=18 when l=5, find w

jolli1 [7]

Answer:

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Step-by-step explanation:

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3 years ago

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A triangle has a perimeter of 10a + 3b + 12 and has sides of length 3a + 8 and 5a + b what is the length of the third side ?

RideAnS [48]

Answer:

2a +2b +4

Step-by-step explanation:

The perimeter is the sum of the lengths of the three sides. If x represents the length of the third side, then ...

(3a +8) +(5a +b) +x = (10a +3b +12)

Subtracting from the equation everything on the left side that is not x, we get ...

x = (10a +3b +12) -(3a +8) -(5a +b)

= a(10 -3 -5) +b(3 -1) +(12 -8)

= 2a +2b +4

The length of the third side is 2a +2b +4.

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2 years ago

Jessica and Patricia finished 2/5 of their group project in 4/5 hour. If Jessica and Patricia's rate stayed the same, how much o

kvv77 [185]

Answer:

1/3

Step-by-step explanation:

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2 years ago

The mean number of children among a sample of 15 low-income households is 2.8. The mean number of children among a sample of 19

gtnhenbr [62]

Answer:

Step-by-step explanation:

Let's put the data as below:

n1=15 x1=2.8 s1=1.6 and s1²=2.56

n2=19 x2=2.4 s2=1.7 and s2²=2.89

alpha= 0.05

To test the hypothesis:

H0= There is no sufficient evidence that low income household have fewer children

H1=There is sufficient evidence that low income household have fewer children

Assume that population variances are equal.

the t-static for two samples,

$t=\frac{x1-x2}{Sp\sqrt{\frac{1}{n1}-\frac{1}{n2} \\} } }$ ~t with min (n1-1,n2-1)df

The pooled variance estimate Sp equals:

$Sp^{2}=\frac{(n1-1)s1^{2}+(n2-1)s2^{2} }{n1+n2-2}$

Sp²=2.7456

Sp=1.65699

Degrees of freedom=n1+n2-2=32

Under null hypothesis:

$tcal=\frac{|2.8 - 2.4|}{1.6599\sqrt{\frac{1}{15}+\frac{1}{19} } }$

$tcal=0.6989$

The critical value ttab=2.0369 for alpha=0.05

So we reject our null hypothesis H0

So there is sufficient evidence that low income households have fewer children than high income households

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3 years ago