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Vedmedyk [2.9K]
3 years ago
8

Simplify (5-7 O A 1 / 1 O B. 52 O C. O D. 52

Mathematics
1 answer:
Lilit [14]3 years ago
5 0
I don’t know the answer sorry
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Mary walks a certain distance up a road that climbs a hill. The vertical component of her displacement is 17.63 meters, and the
lozanna [386]

Answer:

10 degrees.

Step-by-step explanation:

That would be the angle whose tangent is

17.63 / 100= 0.1763.

That angle is   10 degrees.

4 0
4 years ago
Jeremy is digging a hole. The bottom of the hole is – 2.8 ft from the top of the
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10 ft apart
Not sure

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4 0
3 years ago
Solve the system using elimination.
Wewaii [24]

Answer:

The answer is A.

Step-by-step explanation:

A. 3*(-9)=  -27, 4*(-9)= -36, -27-(-36)= 9

B. 3*(-27)= -81, 4*(-9)= -36, -81- (-36) = -45

C. 3*3= 9, 4*9= 36, 9-36= -27

D. 3*(-3)= -9, 4*(-6)= -24, -9-(-24)= 15

4 0
4 years ago
Lyme disease is spread in the northeastern United States by infected ticks. The ticks are infected mainly by feeding on mice, so
Stels [109]

Answer: 90% confidence interval is; ( - 0.0516, 0.3752 )

 

Step-by-step explanation:

Given the data in the question;  

n1 = 72, n2 = 17

P1 = 54 / 72 = 0.75

P2 = 10 / 17 = 0.5882

so

P_good = 0.75

P_bad = 0.5882

standard ERRROR will be;

SE = √[(0.75×(1-0.75)/72) + (0.5882×(1-0.5882)/17)]

SE = √( 0.002604 + 0.01424)

SE = 0.12978

given confidence interval = 90%

significance level a = (1 - 90/100) = 0.1, |Z( 0.1/2=0.05)| = 1.645   { from standard normal table}

so

93% CI is;

(0.75 - 0.5882) - 1.645×0.12978 <P_good - P_bad<  (0.75 - 0.5882) + 1.645×0.12978

⇒0.1618 - 0.2134 <P_good - P_bad<  0.1618 + 0.2134

⇒ - 0.0516  <P_good - P_bad< 0.3752

Therefore 90% confidence interval is; ( - 0.0516, 0.3752 )

4 0
3 years ago
Solve this polynomial:
ivann1987 [24]
2d^2 -2d-7

(14d^2 - 8) + (6d^2 - 2d + 1)
14d^2 - 8+ 6d^2 - 2d + 1
20d^2 - 7 - 2d
20d^2 - 2d - 7
4 0
3 years ago
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