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3 years ago

In the expression 2x + 3, the 2 is called the

Mathematics

2 answers:

Firlakuza [10]3 years ago

8 0

A. coefficient is the answer

IceJOKER [234]3 years ago

4 0

Answer:

the answer is A the coefficient

Step-by-step explanation:

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Annie has two jobs. She gets paid $13.04 per hour for tutoring at City College and $9.75 per hour at a coffee shop. Last week sh

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Answer:

ahow much did she earn(in dollars)

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2 years ago

Read 2 more answers

Find+the+positive+value+for+α+if+the+radius+of+the+circle+3x^2+3y-6αx+12y-3α=0+is+4

Alik [6]

Answer:

$\alpha=3$

Step-by-step explanation:

<u>Equation of a Circle</u>

A circle of radius r and centered on the point (h,k) can be expressed by the equation

$(x-h)^2+(y-k)^2=r^2$

We are given the equation of a circle as

$3x^2+3y^2-6\alpha x+12y-3\alpha=0$

Note we have corrected it by adding the square to the y. Simplify by 3

$x^2+y^2-2\alpha x+4y-\alpha=0$

Complete squares and rearrange:

$x^2-2\alpha x+y^2+4y=\alpha$

$x^2-2\alpha x+\alpha^2+y^2+4y+4=\alpha+\alpha^2+4$

$(x-\alpha)^2+(y+2)^2=r^2$

We can see that, if r=4, then

$\alpha+\alpha^2+4=16$

Or, equivalently

$\alpha^2+\alpha-12=0$

There are two solutions for $\alpha$ :

$\alpha=-4,\ \alpha=3$

Keeping the positive solution, as required:

$\boxed{\alpha=3}$

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2 years ago

20cm rounded dto thenearest tenth

NNADVOKAT [17]

Answer:

20cm rounded to the nearest tenth is 20cm

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2 years ago

What does c equal in this equation 6c + 11 = 2c + 59

irinina [24]

Combine like terms you would get 4c=48 then divide it by 4 you'll get c=12

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2 years ago

Two trains leave towns 1490 kilometers apart at the same time and travel toward each other. One train travels 20 km/h slower tha

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Answer:

rate 1. 50 2. 56

Step-by-step explanation:

if you graph them all together.

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2 years ago