MATHEMATICS HIGH SCHOOL

-3x + 4y – 5xy ; x= -3, y = 2
Need help ASAP plz

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

First, plug in the numbers.

x = -3 and y = 2.

-3(-3) + 4(2) - 5(-3)(2)

Simplify by multiplying.

-3 * -3 = 9

4 * 2 = 8

-5 * -3 * 2 = 30

Your new equation is:

9 + 8 + 30 = ?

Simplify by adding. 9 + 8 + 30 = 47

Answer 2

Answer:

Answer:

Step-by-step explanation:

-3(-3) + 4(2) - 5(-3)(2)

9 + 8 + 30 = 47

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If a chicken farm sold 3,000 dozen eggs last week, how many individual eggs were sold?A. 36,000
B. 250
C. 3,000
D. 3,600

Answers

The number of individual eggs that were sold is (a) 36,000

How many individual eggs were sold?

From the question, we have the following parameters that can be used in our computation:

Eggs = 3000 dozen

By defintiion

1 dozen = 12

substitute the known values in the above equation, so, we have the following representation

Eggs = 3000 * 12

Evaluate

Eggs = 36000

Hence, a total of (a) 36000 individual eggs were sold

Answers

So we want to know how much money will Chuy save if he saves an exact amount of money for the new TV each week for 27 weeks and will he be able to buy the TV worth 1350$ with the saved money. First lets calculate what amount of money does he save on the weekly bases: 440$/8=55$. So he is saving 55$ per week. Lets see how much will he save in 27 weeks: 55$*27=1485$. Since the TV costs 1350$ and Chuy will save 100$ more in 27 weeks the corresct answer is c.

If f(x) = 3x2 – 4 and g(x) = 2x – 6, what is g(f(2))?
O-16
o -2
O 8
0 10

Answers

Answer:

The last option, 10 is correct

Step-by-step explanation:

f(x) = 3x^2 - 4

f(2) = 3(2)^2 - 4

f(2) = 12 - 4

f(2) = 8

g(x) = 2x - 6

g(8) = 2(8) - 6

g(8) = 16 - 6

g(8) = 10

This means that g(f(2)) is equal to 10

Answer:

Its 10 or D

Step-by-step explanation:

You drive 6.0 km at 50 km/h and then another 6.0 km at 90 km/h. Your average speed over the 12 km drive will be _________

Answers

Answer:

$64.29\ (km)/(h)$

Step-by-step explanation:

hello

the speed is the relation between a distance traveled and the time used for it and it is given by the equation

$v =(displacement)/(time)\n (1)v=(d)/(t)$

Now, the average speed will be

$v_(average) =(displacement\ total)/(total\ time)\n (1)v=(d)/(t) \n(2)v_(average)=(d_(t) )/(t_(t) )$

Step 1

I drive 6.0 km at 50 km/h

from (1) it is possible to isolate t

$(1)v=(d)/(t)\nt=(d)/(v)$

Let

$v=50 (km)/(h) \nd=6.0 km\nt=(d)/(v) \nt=(6.0 km)/(50 (km)/(h))\nt_(1)=0.12\ hours\n$

Step 2

then I drive 6.0 km at 90 km/h

$v=90 (km)/(h) \nd=6.0 km\nt=(d)/(v) \nt=(6.0 km)/(90 (km)/(h))\nt_(2)=0.067\ hours\n$

Step 3

FInd total time and total displacement

$Total\ time=t_(1) +t_(2) \nt_(t) =0.12\ hours +0.067\ hours =0.187\ hours\n\ntotal\ distance\ =d_(1) +d_(2)=6.0\ km +6.0\ km= 12\ km\n$

step 4

finally, put these values into the equation(2)

$v_(average)=(d_(t) )/(t_(t) )\nv_(average)=(12\ km )/(0.187\ h )\nv_(average)=64.29\ (km)/(h)$

V=64.29 km/h

Have a good day

Answer:

64.2857 km/h

Step-by-step explanation:

Time taken to drive the first 6.0 km in hours = 6/50

Time take to drive another 6.0 km in hours = 6/90

Total time taken to drive 12 km in hours = (6/50) + (6/90)

= 6(50+90)/50x90

= 6x140/50x90

= 840/4500

The average speed over the 12 km is therefore 12 divided by 840/4500

= (12 x4500)/840

= 64.2857 km/h

What is the means-to-MAD ratio of the two data sets, expressed as a decimal? Data set Mean Mean absolute deviation (MAD) 1 10.3 1.6 2 12.7 1.5

Answers

Mean -to-MAD ratio is the division of the Mean by the Mean Absolute Deviaion (MAD). For the set 1, mean / MAD is 10.3 / 1. 6 = 6.4375; and for the set 2, Mean / MAD is: 12.7 / 1.5 = 8.467. This is a measure of disperssion of a set of values. MAD is calculated as the sum of the absolute differences of the values and the mean.

What is the slope of the line that passes through the points (7, -4) and (7, 0)? A. Undefined (vertical line) B. 0 (horizontal line) C. 1 D. Infinity

Answers

Answer: A (Vertical Lines)

Step-by-step explanation:

Final answer:

The slope of a line passing through points (7,-4) and (7,0) is undefined. This is because a line with the same x-coordinate for two different y-coordinates implies a vertical line, which has an undefined slope. Therefore, the correct answer is A. Undefined (vertical line).

Explanation:

The slope of a line passing through two points (x1,y1) and (x2,y2) is defined by the formula slope = (y2 - y1) / (x2 - x1). Given the two points are (7,-4) and (7,0), we use the formula and get slope = (0 - (-4)) / (7 - 7). This results in 0/0 which is undefined mathematically. Furthermore, when a line has the same x-coordinate for two different y-coordinates, it implies the line is vertical. Thus, we can decide that the line passing through those points is indeed a vertical line, and the slope is undefined; as vertical lines have undefined slopes.