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3 years ago

I need help answering

Mathematics

1 answer:

klio [65]3 years ago

7 0

The equation is 20(3) + 25(4) - 10 = $150, the 3 was given for lawns and the 4 was given for Gardens. Plug and Chug

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Use the graph below to answer the following questions.

Maru [420]

Answer:

a) 3
b) x = {-3, -2, 2}

Step-by-step explanation:

Refer to attached for points

a) f(-1) = 3 as per graph

b) f(x) = 6

We add horizontal line through point y=6 to find intersections with the graph

Take x-values of those points. The points are x = -3, x = -2, x = 2

3 0

3 years ago

Help please thank you

LenaWriter [7]

Answer:

B)60m^2

Step-by-step explanation:

The area of the rectangle is 40m^2 and the area of the triangle is 20m^2. So 40+20 is 60.

3 0

2 years ago

Identify any zeros of y=x^2+4x+5.

Jet001 [13]

A there are no real zeros

using the discriminant b² - 4ac to determine the nature of the zeros

for y = x² + 4x + 5 ( with a = 1, b = 4 and c = 5 )

• If b² - 4ac > 0 there are 2 real and distinct zeros

• If b² - 4ac = 0 there is a real and equal zero

• If b² - 4ac < 0 there are no real zeros

b² - 4ac = 16 - 20 = - 4

Since discriminant < 0 there are no real zeros

3 0

2 years ago

Listed below are pulse rates (beats per minute) from samples of adult males and females. Does there appear to be a difference

MrMuchimi

Answer:

There appears to be a difference between the pulse rates from samples of adult males and females. The average pulse rate of males is 63.75 while that of females is 75.875.

Coefficient of Variation (male) = 33.44%

Coefficient of variation (female) = 28.35%

Step-by-step explanation:

Mean (male) = $\frac{sum of x}{n} =\frac{1020}{16} =63.75$

Mean (female) = $\frac{sum of y}{n} = \frac{1214}{16} = 75.875$

Standard Deviation (male) = $\sqrt{\frac{sum(x-63.75)^2}{16-1} } =21.315$

Standard Deviation (female) = $\sqrt{\frac{sum(y-75.875)^2}{16-1} } = 21.512$

Coefficient of Variation = $\frac{Std dev}{mean} *100$

For male, CV = $\frac{21.315}{63.75} *100=33.44%$ %

For female, CV = $\frac{21.512}{75.875} *100=28.35$ %

Comparison : Pulse rates of males has more variability than that of females since it has a greater coefficient of variation.

5 0

3 years ago

Read 2 more answers

The scale for a scale drawing is 8 millimeters: 1 centimeter. Which is larger,the actual object or the scale drawing?explain

amm1812

The scale is a representation of what the drawing is to real life. The drawing will tend to be represented by a fixed figure such as 1 cm. In this case for every cm of drawing it is a representation of 8 millimetres in real life, therefore the drawing is bigger than the object.

4 0

3 years ago