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professor190 [17]
3 years ago
5

Peter sells 2/3 lb. of rice every 1/3 hour. How much rice does Peter sell in an hour? Please explain

Mathematics
1 answer:
lukranit [14]3 years ago
7 0
For this you should set up a proportion.

2/3. 1/3
------ = --------
x. 3/3

Then cross multiply 3/3 x 2/3 and divide by 1/3

2/3 x 3/3 = 6/9

6/9 \ 1/3 = 6/9 x 3/1 = 18/1

Peter sells 18 bags of rice per hour.
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3 years ago
Daniel wanted to know his approximate score on the final exam for his mathematics class. His professor hinted that his score was
frozen [14]

Answer: 101.69

Step-by-step explanation:

Formula we use to find the z-score :-

z=\dfrac{x-\mu}{\sigma}    (1)

Given : \mu=90

\sigma=7

Daniel's z score : z= 1.67

Let x be the raw score for Daniel's exam grade, then substitute the values of \mu,\ \sigma\ and \ x in (1), we get

1.67=\dfrac{x-90}{7}\\\\\Rightarrow\ x-90=7\times1.67\\\\\Rightarrow\ x=11.69+90=101.69

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3 0
2 years ago
PLEASE HELP!!This is joshs solution for the equation x^2-6x-7=0: x^2-6x-7=0
iren [92.7K]

Answer:

  no. see below

Step-by-step explanation:

This much of Josh's working is correct:

  x^2-6x=7

  x^2-6x+9=7+9

  (x-3)^2=16

At this point Josh apparently overlooked the fact that he needed to take the square root of both sides of the equation. Had he done that, he would have ...

  x -3 = ±4

  x = 3+4 . . . or . . . 3 -4

  x = 7 or -1

_____

Josh reported values of x that would match ...

  x -3 = ±16

He <em>violated the equal sign</em> by taking the square root on the left, and multiplying by ±1 on the right. Doing different operations on the two sides of the equation will mean the value of x is changed to something other than what you're looking for.

4 0
2 years ago
State the vertical asymptote of the rational function:<br> f(x) = ((x - 9)(x + 7)) / (x^2 - 4)
Sav [38]

Answer:

Vertical Asymptotes: x=-2,2

Horizontal Asymptotes: y=1

Step-by-step explanation:

Plz mark brainliest.

4 0
2 years ago
Please answer this correctly
larisa [96]
731.8, 730.63, 730.38, 730.1

Hope this helps!
3 0
3 years ago
Read 2 more answers
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