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3 years ago

Which is a ordered pair for y=4x

Mathematics

1 answer:

Fofino [41]3 years ago

3 0

(0,0) , (1,4) , ( 2,8) are the ordered pairs

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Kayla used 4/14 of her allowance to buy yogurt and 8/14 of her allowance to go skating. What fraction of her allowance does she

Monica [59]

4/14+8/14=12/14, so she has 2/14 left

7 0

3 years ago

find the surface area of a right square pyramid if the area of the base is 144 cm squared and the height of the pyramid is 42 cm

xxTIMURxx [149]

Area of a pyramid is ⅓ * area of Base * height

or ⅓ * 144 * 42 or 2016 cm³

4 0

3 years ago

Determine the solution and indicate the restrictions on the variable.

cupoosta [38]

Answer:

Step-by-step explanation:

Subtract 20 from both sides:

$-\sqrt{9-8x} =-15$

Divide both sides by -1:

$\sqrt{9-8x} =15$

Square both sides:

$9-8x=255$

Subtract 9 by both sides:

$-8x=216$

Divide both sides by -8:

$x=-27$

That means that either a or b is correct and since 9/8 is positive that means it needs to bee less than 9/8 so the correct answer is B

5 0

2 years ago

A weather forecasting website indicated that there was a 50% chance of rain in a certain region. Based on that report, what is t

faltersainse [42]

It is most likely going to rain

4 0

3 years ago

Read 2 more answers

In 2011, 51% of cell phone owners in a country reported that their cell phone was a smartphone. The following year, the research

Dovator [93]

Answer:

The calculated value Z = 1.5950 < 1.96 at 0.05 level of significance

The null hypothesis is accepted at a 0.05 level of significance

The proportion of cell phone owners in that country who have a smartphone has not increased over time

Step-by-step explanation:

Step(i):-

Given that the random sample size 'n' = 934

Given that the population proportion P = 0.51

Q= 1-P

Q = 1- 0.51 = 0.49

The sample proportion

$p = \frac{x}{n} = \frac{501}{934} = 0.5364$

Level of significance = 0.05

Critical value Z₀.₀₅ = 1.96

Step(ii):-

Null hypothesis: P < 0.51

Alternative Hypothesis : P > 0.51

Test statistic

$Z = \frac{p-P}{\sqrt{\frac{PQ}{n} } }$

$Z = \frac{0.536-0.51}{\sqrt{\frac{0.51 x 0.49}{934} } }$

Z = 1.5950

Final answer:-

Given that P-value 0. 0532

P-value > 0.05

Rejected Alternative Hypothesis and accepted null hypothesis

( OR)

The calculated value Z = 1.5950 < 1.96 at 0.05 level of significance

The null hypothesis is accepted at a 0.05 level of significance

The proportion of cell phone owners in that country who have a smartphone has not increased over time

3 0

3 years ago