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timofeeve [1]
3 years ago
10

Someone please help me with this problem

Mathematics
2 answers:
tamaranim1 [39]3 years ago
5 0

Answer:

sorry my cumputer is not working

Step-by-step explanation:

yulyashka [42]3 years ago
4 0

Answer:

Sine is 12/13 = 0.9230

Step-by-step explanation:

take the length of the side opposite the given angle and divide by the length of the hypotenuse. Here that is 12÷13 = .9230

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8x + y = -39<br> 2x - 5y = 27<br> Solve the system by elimination
Ahat [919]

Answer:

(-4, -7)

Step-by-step explanation:

21y=-147

y=-7

2x-5x(-7)=27

x=-4

5 0
3 years ago
A toy manufacturer wants to know how many new toys children buy each year. A sample of 1492 children was taken to study their pu
julia-pushkina [17]

By assuming the standard deviation of population 2.2 the confidence interval is 8.67 toys,8.94 toys.

Given sample size of 1492 children,99% confidence interval , sample mean of 8.8, population standard deviation=2.2.

This type of problems can be solved through z test and in z test we have to first find the z score and then p value from normal distribution table.

First we have to find the value of α which can be calculated as  under:

α=(1-0.99)/2=0.005

p=1-0.005=0.995

corresponding z value will be 2.575 for p=0.995 .

Margin of error=z*x/d

where x is mean and d is standard deviation.

M=2.575*2.2/\sqrt{1492}

=0.14

So the lower value will be x-M

=8.8-0.14

=8.66

=8.67 ( after rounding)

The upper value will be x+M

=8.8+0.14

=8.94

Hence the confidence interval will be 8.67 toys and 8.94 toys.

Learn more about z test at brainly.com/question/14453510

#SPJ4

8 0
2 years ago
Corrected work and description of error
hichkok12 [17]

Answer:

hmm i have no idea can u send a clear pic of question?

8 0
2 years ago
What is the area of this parallelogram?<br><br><br> 104 m²<br><br> 88 m²<br><br> 56 m²<br><br> 32 m²
iragen [17]

Answer: To find area of a rectangle, multiply its base (length) by its height (width). Plug in the base, 7 meters, and the height, 8 meters. So the area of Rectangle DFBE is 56 square meters.

88m

HOPE THIS HELPS

6 0
3 years ago
Simplify 2y-6x+5+4y<br> What is the answer?
Misha Larkins [42]

Answer:

Answer = −6x+6y+5

3 0
3 years ago
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