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3 years ago

In one particular suburb, there are 12 families that own a bulldog. If there are a total

Mathematics

1 answer:

Lelechka [254]3 years ago

3 0

Answer: 30%

Step-by-step explanation:

There are 12 families that own a bulldog and there are total of 40 families that own a dog. Percentage of dogs owners with a bull dog can be written as:

Number of bulldog owners/Total number of dog numbers × 100

= 12/40 × 100

= 3/10 × 100

= 30%

The percentage of bulldog owners is 30%.

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Find the value of y.<br> Picture below

olga2289 [7]

We have trapezoid with congruent legs.

30x + 11y = 2x + 3

28x +11y = 3

Also we have

30x + 11y = 12

We got 2 equations:

30x + 11y = 12

28x +11y = 3 (*-1) -----> -28x -11y = -3

30x + 11y = 12

2x = 9

x=9/2

30x + 11y = 12 ------> 30*9/2 +11y =12 ------> 135+11y =12, ---> 11y = - 123,

y= - 123/11

6 0

2 years ago

The length of a rectangle is 3 times the width. The perimeter is

Dmitrij [34]

Answer:

is it from a text book

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Each year, all final year students take a mathematics exam. It is hypothesized that the population mean score for this test is 8

drek231 [11]

Answer:

95% Confidence interval: (96.06,103.94)

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 85

Sample mean, $\bar{x}$ = 100

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 11

95% Confidence interval:

$\mu \pm z_{critical}\frac{\sigma}{\sqrt{n}}$

Putting the values, we get,

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

$100 \pm 1.96(\frac{11}{\sqrt{30}} ) = 100 \pm 3.94= (96.06,103.94)$

(96.06,103.94) is the 95% confidence interval for the population mean test score.

8 0

3 years ago

Sharonda is plotting quadrilateral PQRS on the graph below. She will plot the fourth and

lana [24]

Answer:

11 units

Step-by-step explanation:

Length of side PS can be calculated using the distance formula, $d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$

Where,

$P(-2, 5) = (x_1, y_1)$ (the coordinate of P is gotten from the graph)

$S(9, 5) = (x_2, y_2)$ (given)

$PS = \sqrt{(9 - (-2))^2 + (5 - 5)^2}$

$PS = \sqrt{(11)^2 + (0)^2}$

$PS = \sqrt{121} = 11 units$

3 0

3 years ago

Find the sum of 2/3+(-1/3)

leva [86]

2/3+(-1/3)
2/3-1/3
1/3

Your answer is 1/3

5 0

3 years ago