1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
dmitriy555 [2]
2 years ago
13

Help solve this thanks

Mathematics
2 answers:
maw [93]2 years ago
5 0

Answer: 8cm

Step-by-step explanation: area= width*height

pochemuha2 years ago
3 0

Answer: x = 8cm

Step-by-step explanation:

A = 51,2cm²

w = 6,4cm

A = l × w

l = \frac{A}{w}

I = \frac{51,2}{6,4}

l = 8cm

You might be interested in
A research company desires to know the mean consumption of meat per week among people over age 23. A sample of 164 people over a
Elan Coil [88]

Answer:

The 80% confidence interval for the mean consumption of meat among people over age 23 is between 4 and 4.2 pounds.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.8}{2} = 0.1

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.1 = 0.9, so z = 1.28

Now, find M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.28*\frac{0.7}{\sqrt{164}} = 0.07

The lower end of the interval is the mean subtracted by M. So it is 4.1 - 0.07 = 4.03 pounds

The upper end of the interval is the mean added to M. So it is 4.1 + 0.07 = 4.17 pounds

Rounded to one decimal place

The 80% confidence interval for the mean consumption of meat among people over age 23 is between 4 and 4.2 pounds.

8 0
2 years ago
Please help!!! Express the area of the entire rectangle.
Mademuasel [1]
17x +x to the second power
4 0
2 years ago
A student writes the difference between 15 and the product of 5 and y to describe the expression 5y negative 15
mezya [45]
The difference means subtract
5y means product or 5 times y
5y - 15
4 0
3 years ago
What is the the slope that passes through the points (4,-7) and (9,1)
bulgar [2K]

Answer:

8/5

Step-by-step explanation:

We can use the formula for finding slope for this:  \frac{y_{2}-y_{1}}{x_{2}-x_{1}}

\frac{1 - (-7)}{9 - 4}

\frac{8}{5}

The answer would be 8/5

3 0
3 years ago
Read 2 more answers
Area of a rectangle 8cm long and 4cm in height. please tell me how to do this also, I'm so confused.
Tema [17]
The area of a rectangle is easy to compute.
Area = length times height
Area = 8 cm * 4 cm = 32 square centimeters
6 0
3 years ago
Other questions:
  • Find the mesrement of k
    14·1 answer
  • Please help me with this
    5·1 answer
  • Help me with the question below
    10·2 answers
  • How many gallons of a 90% antifreeze solution must be mixed with 90 gallons of 20% antifreeze to get a mixture that is 80% antif
    13·1 answer
  • Twice a number is decreased by 20 is 50. What is the number?
    11·1 answer
  • 2cos^2A-cos2A-1=0 <br> Help
    6·1 answer
  • 7. If P = [5,6,7,8). Q = (2,4,6,8) and<br>R=2, 3, 7, 9), then P nQnR=​
    10·2 answers
  • If f(x)= x3 - 2x, find f(-2)
    14·1 answer
  • 549.5 to 1 decimal place
    6·2 answers
  • 7) If you can buy 4 tulip bulbs for $8<br> then how many<br> bulbs can you buy with $32?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!