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3 years ago

Unit 1 Lesson 14: Unit 1 Test February 12, 2020

Mathematics

1 answer:

mrs_skeptik [129]3 years ago

7 0

Answer:

are you in conexus :-):-):-):-):-)

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Given that a:b:c= 20 : 35 : 15, a) simplify a : b:c, b) find a:b,

Furkat [3]

Answer:

a) 4:7:3

b) 4:7 / 20:35

c) 3:7 / 15:35

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2 years ago

The unit rate of change of y with respect to x is the amount y changes for a change of one unit in x. Is the unit rate of change

Nataly [62]

Answer:

Option (a). The equation

Step-by-step explanation:

Rate of change of any equation or graph is represented by its slope 'm'.

In an equation y = mx + b

'm' represents the slope.

Given equation is,

y = 0.25x

Slope of the line m₁ = 0.25

From the graph attached,

A line passes through two points (0, 0) and (5, 1)

Slope of the line = $\frac{y_2-y_1}{x_2-x_1}$

m₂ = $\frac{1-0}{5-0}$

m₂ = 0.2

m₁ > m₂

Therefore, unit rate of change in y is greater in the given equation.

Option (a) will be the answer.

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3 years ago

Read 2 more answers

Help please an someone explain this to me i'm confused

maria [59]

Answer:

Jesus I can't help, I would take the educational guess if I was you

Step-by-step explanation:

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3 years ago

It is believed that a stock price for a particular company will grow at a rate of $5 per week with a standard deviation of $1. A

IgorLugansk [536]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = $5

For the alternative hypothesis,

µ < $5

number of samples taken = 10

Sample mean, x = (4 + 3 + 2 + 3 + 1 + 7 + 2 + 1 + 1 + 2)/10 = 2.6

To determine sample standard deviation, s

s = √(summation(x - mean)/n

n = 12

Summation(x - mean) = (4 - 2.6)^2 + (3 - 2.6)^2 + (2 - 2.6)^2 + (3 - 2.6)^2 + (1 - 2.6)^2 + (7 - 2.6)^2 + (2 - 2.6)^2 + (1 - 2.6)^2 + (1 - 2.6)^2 + (2 - 2.6)^2 = 30.4

s = √30.4/10 = 1.74

Since the number of samples is 10 and no population standard deviation is given, the distribution is a student's t.

Since n = 10,

Degrees of freedom, df = n - 1 = 10 - 1 = 9

t = (x - µ)/(s/√n)

Where

x = sample mean = 2.6

µ = population mean = 5

s = samples standard deviation = 1.74

t = (2.6 - 5)/(1.74/√10) = - 4.36

We would determine the p value at alpha = 0.05. using the t test calculator. It becomes

p = 0.000912

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3 years ago

12 1/3 x 4<br> simplify all fractions. Write all improper fractions as mixed numbers.

VashaNatasha [74]

Answer:

12 1/3 x 4 after simplification is 49 1/3

Step-by-step explanation:

We need to simply the fraction

12 1/3 * 4

Converting mixed fraction into improper fraction

37/3*4

Multiplying 4 with 37

148/3

Converting it into mixed fraction

49 1/3

12 1/3 x 4 after simplification is 49 1/3

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3 years ago