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nika2105 [10]
3 years ago
5

Please answer all for brainlest and thanks !!! I'm begging :((

Mathematics
2 answers:
expeople1 [14]3 years ago
5 0
For #2, you have to convert the mixes fractions to improper fraction so you can divide them.
To do that, multiply the denominator by the whole number, and add the numerator. Then use that number as the new numerator.

2 x 3 = 6
6 + 1 = 7/2

4 x 1 = 4
4 + 1 = 5/4

Then to find the unit rate, you divide. To do that, use the saying "keep, change, flip".

7/2 • 4/5

Then multiply!

7 x 4 = 28
2 x 5 = 10
28/10

Then divide 28 by 10 to turn it back into a mixed fraction.

2 8/10

Hope I could help! If I have time later I'll try to help you solve the rest :D

Eva8 [605]3 years ago
4 0
You can find a unit rate when given a rate by dividing the the second number in the rate (if you had 3:4, you would divide 4) by the same number. (in the problem I gave you, you would divide 4 by 4 to get 1 then divide 3 by 4.) Then you would have the unit rate. Sorry if that didn't make any sense.
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Based on the Nielsen ratings, the local CBS affiliate claims its 10 p.m. newscast reaches 41% of the viewing audience in the are
damaskus [11]

Answer:

H0:p=0.41

Step-by-step explanation:

The null hypothesis always contain equality i.e. (=) sign. The null hypothesis contains the statement regarding population parameter. Here, the claim about population proportion is mentioned in the statement that 10 p.m. newscast of local CBS reaches 41% of viewers. So, the null hypothesis would be

Null hypothesis:H0: p=0.41.

4 0
2 years ago
Kim will say 50% in she opens a credit card she wants to buy a jacket for 120 what will be her savings
Maurinko [17]

Answer:

Kims savings will be $60.

Step-by-step explanation:

120 * .50 = 60

7 0
3 years ago
A cyclist rides 14 miles in 47 minutes.<br><br>What is the speed of the cyclist in miles per hour
DedPeter [7]

Step-by-step explanation:

20miles per hour HAVE A GOOD DAY

3 0
2 years ago
At which points are the tangents drawn to the ellipse x 2 + y 2 = [ a ] x + [ a ] y parallel to
In-s [12.5K]

The given equation of the ellipse is x^2 + y^2 = 2 x + 2 y

At tangent line, the point is horizontal with the x-axis therefore slope = dy / dx = 0

<span>So we have to take the 1st derivative of the equation then equate dy / dx to zero.</span>

x^2 + y^2 = 2 x + 2 y

x^2 – 2 x = 2 y – y^2

(2x – 2) dx = (2 – 2y) dy

(2x – 2) / (2 – 2y) = 0

2x – 2 = 0

x = 1

 

To find for y, we go back to the original equation then substitute the value of x.

x^2 + y^2 = 2 x + 2 y

1^2 + y^2 = 2 * 1 + 2 y

y^2 – 2y + 1 – 2 = 0

y^2 – 2y – 1 = 0

Finding the roots using the quadratic formula:

y = [-(- 2) ± sqrt ( (-2)^2 – 4*1*-1)] / 2*1

y = 1 ± 2.828

y = -1.828 , 3.828

 

<span>Therefore the tangents are parallel to the x-axis at points (1, -1.828) and (1, 3.828).</span>

3 0
3 years ago
QUESTION 1<br> Find the derivative of the function f(x)= /7x-8 using the limiting process.
Greeley [361]

Answer: Apply the Sum/Difference Rule

            d/dx(7x)-d/dx(8)

               d/dx(7x)=7

               d/dx(8)=0

                  7-0=7

                   

Step-by-step explanation: The answer is 7

4 0
3 years ago
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