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2 years ago

If a= 2,b= -1,c= -3 and d = -2 evaluate the following Q1. ab-3b+4d , Q2. 5abd+3bc-2ax and Q3. 2(ab)^2+bc^2

Mathematics

1 answer:

Serggg [28]2 years ago

8 0

Answer:

the answer for question 1 is -7

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Find the slope of the line through (4, 6) and (4, 10). A.0 B.3 C.1/3 D. Undefined

Neko [114]

Answer:

D. Undefined

Step-by-step explanation:

4-4 = 0, 10-6 = 4

Change of x = 0

Change of y = 4

Since the change of x is 0 (a horizontal line), it is undefined.

6 0

2 years ago

Regina spent $45.50 over 612 months on music downloads.

krok68 [10]

Answer:

.07 cents

Step-by-step explanation:

In order to solve this question all you need to do is divide the money spent by the amount of months. 45.50/612=0.0743464052 but since you cant spend .0043464052 of a cent we have to change the answer to .07. To check our answer is right all we need to do is multiply 0.0743464052 by 612=45.499999 so we know the answer is correct.

7 0

2 years ago

Read 2 more answers

How many solutions does the equation 5x + 3x − 4 = 10 have? (4 points) Zero One Two Infinitely many

podryga [215]

Hey there!

Let's solve this equation.

5x+3x-4=10

add the x's

8x-4=10

add 4 to both sides

8x=10+4

8x=14

divide both sides by 8

x=14/8

Reduce the fraction;

x=7/4 (improper fraction)

x=1+3/4 (mixed number)

Hence, the equation has 1 solution.

Hope everything is clear.

Let me know if you have any questions!

#ILoveLearning

:-)

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2 years ago

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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

2 years ago

What is –4b + 8c + 12 – 8b – 2c + 6 simplifyed ?

Ede4ka [16]

Answer:

Answer!!!!!

-12b + 6c + 18

6 0

2 years ago

If a= 2,b= -1,c= -3 and d = -2 evaluate the following Q1. ab-3b+4d , Q2. 5abd+3bc-2ax and Q3. 2(ab)^2+bc^2​

If a= 2,b= -1,c= -3 and d = -2 evaluate the following Q1. ab-3b+4d , Q2. 5abd+3bc-2ax and Q3. 2(ab)^2+bc^2