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3 years ago

I have 2 questions. Please help me with them. Thank you.

Mathematics

1 answer:

zavuch27 [327]3 years ago

6 0

(x+8)^(2) + (y+9)^(2) = 169
(x+8)^(2) + (y+9)^(2) = 13^2

h = -8
k = -9
r = 13

answer
A. center (-8,-9)
radius = 13

--------------

(x-7)^2 + y^2 = 225
(x-7)^2 + y^2 = 15^2

h = 7
k = 0
r = 15

answer
B. center (7,0)
radius = 15

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A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile. How much, in dollars, would it co

katrin2010 [14]

Answer:

$\frac{3xr}{200}$

Step-by-step explanation:

A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile

rate is cents . convert it in to dollars

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r cents = r/100 dollars

Each people travels x miles

cost is $\frac{r}{100} \cdot x$

For 3 people the cost is

$3\frac{r}{100} \cdot x$

Discount is 50%, so we divide by 2

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4 years ago

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3 years ago

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Sveta_85 [38]

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3 years ago

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Anna [14]

Answer:

a. y = -x + 9

Step-by-step explanation:

slope-intercept form is

y = mx + b

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3 years ago

How to answer h/4 ≤ 2/7

Serjik [45]

I feel you, headaches suck.

Your answer would be h ≤ 8/7

Step 1 :

Simplify —

Equation at the end of step 1 :

h 2

— - — ≤ 0

4 7

Step 2 :

Simplify —

Equation at the end of step 2 :

h 2

— - — ≤ 0

4 7

Step 3 :

Calculating the Least Common Multiple :

3.1 Find the Least Common Multiple

The left denominator is : 4

The right denominator is : 7

After calculating the multipliers you get h ≤ 8/7

Hope this helps!

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3 years ago