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2 years ago

How do you solve a proportion? (Like not how To but What do i do Because the question Is how do you solve a proportion.)

Mathematics

1 answer:

maksim [4K]2 years ago

3 0

Answer:

By cross-multiplying?

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Determine whether the underlined value is a parameter or a statistic. In a national survey on substance abuse comma Modifying 66

Iteru [2.4K]

Answer:

Parameter

Step-by-step explanation:

Parameter and statistic:

Parameter is a numerical value that describes a population.
A sample is a part of the population and always smaller than the population.
The statistic is a numerical value that describes a sample.

Population of interest:

College students aged 18 to 22

Parameter:

66.4% reported using alcohol within the past month

Thus, the given is a parameter as it describes a population proportion.

4 0

2 years ago

Triangle def is similar to triangle xyz. what is the value of x?

nexus9112 [7]

Answer:

x = 48 ft

Step-by-step explanation:

Triangle DEF is similar to triangle XYZ

10 x 4 = 40 ft

12 x 4 = 48 ft

Answer

x = 48 ft

3 0

2 years ago

Lin's grandmother ordered needles that were 0.3125 inches. The pharmacist sent her 0.6875 inches needles. How longer were these

dybincka [34]

Answer:

0.375

Step-by-step explanation:

0.6875-0.3125 = 0.375

8 0

1 year ago

Can someone please help me with this?

natulia [17]

I believe it is -8 since the point where the line is x=80 and y=-10. Then you divide x/y (80/-10) and get -8.

6 0

2 years ago

Read 2 more answers

Please help me solve question 5.) with the letters a) & b)

tatyana61 [14]

Answer:

Step-by-step explanation:

5.(a)

x²+6x-15=0

$x=\frac{-6\pm\sqrt{36+4*15}}{2*1}\\x=\frac{-6\pm\sqrt{36+60} }{2}\\x=\frac{-6\pm\sqrt{96} }{2}\\x=\frac{-6\pm4\sqrt{6} }{2}\\x=-3\pm2\sqrt{6}$

(b)

4x²-8x-1=0

$x=\frac{8\pm\sqrt{64+4*4}}{2*4}\\x=\frac{8\pm\sqrt{80}}{8}\\x=\frac{8\pm 4\sqrt{5} }{8}\\x=\frac{2\pm\sqrt{5}}{2}$

7 0

2 years ago