The work of a student to solve a set of equations is shown:Equation A: y = 15 – 2z

Equation B: 3y = 3 – 4z

Step 1: –3(y) = –3(15 – 2z) [Equation A is multiplied by –3.]
3y = 3 – 4z [Equation B]
Step 2: –3y = 15 – 2z [Equation A in Step 1 is simplified.]
3y = 3 – 4z [Equation B]
Step 3: 0 = 18 – 6z [Equations in Step 2 are added.]
Step 4: 6z = 18
Step 5: z = 3

In which step did the student first make an error

Answers

Answer 1

Answer: Step 1. Equation B could not have simplified out to 3y= 3 - 4z because Equation A's original equation was y= 15 - 2z. That means after the multiplication by -3, -3(y)= -3(15 - 2z) it would equal -3y= -45 + 6z.

Answer 2

Answer:

Answer:

Step 2

Step-by-step explanation:

Where did the -3 from the first equation get simplified to?

Step 1: –3(y) = –3(15 – 2z)

Step 2: 3y = 15 – 2z

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What is the cross section created when a slice is made perpendicular to the 2 bases of a cylinder?A.a circle

B.an ellipse

C.a rectangle

D.a triangle

Answers

The answer would be C. A cross section is defined is the intersection of a plane in a three-dimensional space. Therefore, cutting a cross section perpendicular to a cylinder would result to a rectangle where the height is equal to the height of the cylinder and its width is same as the diameter of the cylinder base.

Helpp with bothhhh!!!!!

Answers

Answer:

3. x = 5

4. -5 1/25

Step-by-step explanation:

-3x+5=-10

Subtract the 5 from both sides...

-3x = -15

Divide by -3

x = 5

For 4, it's just multiplying.

-2 4/5 in improper form is -14/5

1 4/5 in improper form is 9/5

-14/5 x 9/5 is -126/25

-126/25 can be -5.04 or -5 1/25.

Answer:

3. a (x=5)

4. -126/25

Step-by-step explanation:

3. -3x+5=-10

-3x=-10-5

-3x=-15

x=5

4. -(-2 4/5) x 1 4/5

(-14/5) x 9/5

= -126/25

Y=(x-1)^2+2 find the y-intercept

Answers

Answer:

(0,3)

Step-by-step explanation:

So we have the equation:

$y=(x-1)^2+2$

Recall what the y-intercept is. The y-intercept is when the graph crosses the y-axis. Therefore, at that point, the x-value is 0. So, to find the y-intercept, substitute 0 for x. Thus:

$y=(0-1)^2+2$

Subtract:

$y=(-1)^2+2$

Square:

$y=1+2$

Add:

$y=3$

So, the y-intercept is at (0,3).

And we're done!

Question 6 of 10Which choices are equivalent to the expression below? Check all that apply.
15./20

Answers

Answer:

Option C

Step-by-step explanation:

What is the end behavior of the graph of the polynomial function y = 7x12 – 3x8 – 9x4?

Answers

To know the end behavior of the graph, we look at the degree of the polynomial and the sign of the coefficient of the highest exponent variable.
The degree is 12, which is even.
The coefficient is 7, which is positive.

Therefore, for this type of polynomial function, the end behavior is:
f(x)--> +∞, as x--> −∞
f(x)--> +∞, as x--?>+∞

Answer:

Answer is D) As X---> negative infinity, y --> positive infinity and as x--> positive infinity, y---> positive infinity

Step-by-step explanation:

Just took the test and got it right!!

Hope this helps!!!!

How old would someone be if they were born on the 30th october 1992 ????

Answers

today is March, 19th 2016
so from 1992 have been: 2016 - 1992 = 24 years
but the date is from October 30th, so we are not at 24 years just yet, we are at 23 years and the months and days since last 30th October, that is:
November + December + January + February = 4 months
and some days more, 19 days because today is 19th, so the total is:
23 years, 4 months, 19 days

simple its 2016 and they are born on 1992 so 2016-1992 = 24. but there birthday is in October so they will be 23

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