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pantera1 [17]
3 years ago
7

I think i have the right answer but I don’t know how to show my work/explanation, please help! *GRADE 9 WORK*

Mathematics
1 answer:
IrinaK [193]3 years ago
4 0

Answer:

5 boys

Step-by-step explanation:

boys to girls in math class = 3/12

3/12 can be reduced to 1/4

In the science class, the ratio is the same but there is a total of 20 girls.

Multiply the fraction 1/4 by 2/2, 3/3, 4/4, 5/5, etc. until you get x/20. Then you have 20 girls. x is the number of boys.

1/4 = 2/8 = 3/12 = 4/16 = 5/20

In science the ratio of 1/4 is the same as 5/20, so there are 5 boys.

Answer: 5 boys

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A video game company surveys a random sample of 225 of its best customer and finds that the average gamer spends $406 a year on
Burka [1]
The second survey is more believable because there is randomness in the second rather than the first survey. Since the second company surveyed in all interest levels while the first company only surveyed their best customers. Random sampling like what the second company did helps produce representative samples by removing voluntary response bias and undercover age bias.
8 0
2 years ago
What is the slope of the line that passes through the points (-6, -8)and (-14, 4) ? Write your answer in simplest form.
Bingel [31]

Answer:

Slope = -3/2

Step-by-step explanation:

Slope = \frac{Change -in -y}{Change- in -x}\\\\\\\\Slope = \frac{-8 - 4}{-6 - (-14)}

Slope = \frac{-12}{8}\\\\\\Slope = \frac{-3}{2}\\\\

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6 0
2 years ago
Instructions: Enter your responses as percentages. Include a minus (-) sign for all negative answers. a. The price of good X dec
zalisa [80]

Answer:

COMPLETE QUESTION:

Suppose the own price elasticity of demand for good X is -3, its income elasticity is 1, its advertising elasticity is 2, and the cross-price elasticity of demand between it and good Y is -4. Determine how much the consumption of this good will change if: Instructions: Enter your answers as percentages. Include a minus (-) sign for all negative answers.

a. The price of good X decreases by 5 percent.

b. The price of good Y increases by 8 percent.

c. Advertising decreases by 4 percent.

d. Income increases by 4 percent.

ANSWER

a) The quantity demanded of good X will change by 15 percent

b) The demand for X will change by -32 percent.

c) The demand for good X will change by -8 percent

d) The demand of good X will change by 4 percent

Step-by-step explanation:

Price elasticity of demand measures how responsive  quantity demanded is to a change in the  price of  a commodity.

price elasticity = \frac{\frac{dQ}{Q} }{\frac{dP}{P} } .    

Note:  Same applies to income,advertising and cross-price elasticity.

where, P is the price of the demanded good and Q is the quantity of the demanded good and dQ and dP are the changes in quantities of demanded goods and prices respectively.

a) Quantity demanded on goods X due to decrease by 5 percent in price is ;

-3 = \frac{\frac{dQ}{Q} }{-5}     , therefore  percentage increase in quantity of goods demanded is  (-3 x -5) = 15 percent

       

b) Cross- Price Elasticity; Quantity demanded on goods X due to increase by 8 percent in price in goods Y is;

-4 = \frac{\frac{dQ}{Q} }{8}   , therefore percentage decrease in quantity of goods demanded is  (-4 x 8) = -32 percent

c)  Advertising Elasticity ; Quantity demanded on goods X due to decrease  by 4 percent in advertising is;

2 = \frac{\frac{dQ}{Q} }{-4}   , therefore percentage decrease in quantity of goods demanded is  (2 x -4) = -8 percent

d) Income Elasticity ; Quantity demanded on goods X due to increase by 4 percent in income is;

1 = \frac{\frac{dQ}{Q} }{4}   , therefore percentage increase in quantity of goods demanded is   (1 x 4) = 4 percent

3 0
3 years ago
Someone plz help me with this question with an explanation
Furkat [3]

To use the angle-angle similarity theorem you need to know 2 corresponding angles of each triangle are the same.

You are already shown that angles H and M are the same.

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4 0
3 years ago
Select the equation that represents the question.
Pani-rosa [81]

Answer:

  1. 12=0.005×w
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Step-by-step explanation:

An appropriate representation of the problem can be had by using a variable to represent "what number" and then using the math equivalent symbols for the English words. If "what number" is represented by w, then we want to translate ...

  0.5% of w is 12 . . . . English

  0.005 × w = 12 . . . . . . . matches choice 1

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This can be solved by multiplying by 200

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  w = 2400

The number is 2400.

4 0
2 years ago
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