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KiRa [710]
3 years ago
10

Please help me with my math thank you

Mathematics
1 answer:
V125BC [204]3 years ago
6 0

Answer:

-3

Step-by-step explanation:

ur welcome :)))))

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How many solutions does the system have?Explain
elena55 [62]

Answer:

0

Step-by-step explanation:

-4x+2(2x+3)=8

-4x+4x+3=8

6=8

0=2

no solution

3 0
3 years ago
Find the equation of the line through (-8, -2) & (-4, 6)
Katena32 [7]

Answer:

y=2x+14

Step-by-step explanation:

y=mx+b

(6)-(-2) over (-4)-(-8) = 8 over 4= 2

y=2x+b

y-y1=m(x-x1)

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

y+2=2x+16   subtract 2 on each side

y=2x+14



5 0
4 years ago
In the 1980’s, a clinical trial was conducted to determine if taking an aspirin daily reduced the incidence of heart attacks. Of
zubka84 [21]

There is enough evidence to conclude that taking aspirin cannot  reduces the chance of cancer.

Given sample size of patients take aspirin 11037, sample size of patients who have assigned placebo group be 11034. 104 doctors who take aspirin had a heart attack, 189 doctors had placebo had heart attacks.

First we have to form hypothesis.

H_{0} :p{1} -p_{2} =0

H_{1}:p_{1} -p_{2} < 0

We have to find the respective probabilities.

p_{1}=104/11037

=0.0094

p_{2}=189/11034

=0.0171

Now their respective margin of errors.

s_{1}=\sqrt{ {(0.0094*0.9906)/11037}

=0.0009

s_{2}=\sqrt{0.0171*0.9829}

=0.0011

Hence the distribution of the differences,they are given by:

p=p_{1} -p_{2}

=0.0094-0.0171

=-0.0077

S=\sqrt{s_{1} ^{2}+s_{2} ^{2}  }

=\sqrt{(0.0009)^{2} +(0.0011)^{2} }

=0.00305

z=(p -f)/S (In which f=0 is the value tested at the null hypothesis)

=(-0.0077-0)/0.00305

=-2.52

p value will be 0.005.

p value of 0.05 significance level.

z=1.96.

1.96>0.005

So we will reject the null hypothesis which means it cannot reduce the whole chance of becomming a heart attack.

Hence there is enough evidence to conclude that taking aspirin cannot  reduces the chance of cancer.

Learn more about t test at brainly.com/question/6589776

#SPJ4

6 0
2 years ago
A line with a slope of – 5 passes through the points (3,n) and (4, – 5). What is the value of n?
masha68 [24]

Answer:

n = 0

Step-by-step explanation:

slope = y2-y1/x2-x1

so

-5 -n / 4-3 = -5

-5 -n /1 =-5

-5 - n = -5

n = 0

3 0
3 years ago
Read 2 more answers
David is standing on the deck of his treehouse which is 60 feet high in the tree and looking down at a 59degree angle. In the di
lidiya [134]

Answer:

22 degrees.

Step-by-step explanation:

Please find the attachment.

We have been given that a man is in a tree-house 10 feet above the ground. He is looking at the top of another tree that is 22 feet tall.The bases of the trees are 30 feet apart.

To find the angle of elevation from the man's feet to the top of the tree, we will use tangent because we know adjacent side and opposite side to angle x.

Now, we will use arctan or inverse tan to solve for x as:

Upon rounding to nearest degree, we will get:

Therefore, the angle of elevation from the man's feet to the top of the tree is approximately 22 degrees.

5 0
3 years ago
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