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3 years ago

What is the equation of a circle with center (-7,4) and radius 8?

Mathematics

2 answers:

enot [183]3 years ago

7 0

The answer to this question is
B. (x+7)²+(y-4)²=64

I hope this helps!!!!!!!

marishachu [46]3 years ago

4 0

The answer is b, switch the coordinate signs and then square the 8 because it’s square rooted to get the radius

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Please help me on this.Im stuck on this question.Thanks! :)

Schach [20]

72+57.6+43.2+8.64+8.64

B.) 190.08

6 0

3 years ago

Denise has 5 hours to spend training for an upcoming race. She completes her training by running full speed the distance of the

Rainbow [258]

To solve this problem, we can use this formula d = rd (distance = rates x time) She runs at a speed of 9 mph and walks at a speed of 3 mph. Her distance running is d = 9tr where tr is the time she spends running Her distance walking is d = 3tw where tw is the time she spends walking The distances are the same so 9tr = 3tw We also know that the total time is 5 hours tr + tw = 5 tr = 5-tw Substitute this value of tr in the first equation 9tr = 3tw 9(5-tw) = 3tw 45-9tw = 3tw 45 = 12tw 3.75= tw Denise will spend 3.75 hours (3 hours, 45 minutes) walking back and 1.25 hours (1 hour, 15 minutes) running.

6 0

3 years ago

Y -13 --------- = y -7

mario62 [17]

y-13 / y-7

cross multiply

y-13 = y-7

collect like terms

y+y =-7+13

2y= 13 -7

2y = 6

divide both sides by 2

2y/ 2y = 6/2

y= 3

I hope this helped

4 0

3 years ago

A school district transported a total of 409 students and teachers to a zoo in buses and vans.

valina [46]

Answer: There are 385 students and teachers who rode to the zoo in buses and 24 students and teachers who rode to the zoo in trains.

Step-by-step explanation:

Since we have given that

Total number of students and teachers = 409

Let the number of vans be x

Let the number of buses be x+5

Number of students and teachers each bus transported = 55

Number of students and teachers each van transported = 12

According to question,

$55(x+5)+12x=409\\\\55x+275+12x=409\\\\67x=409-275\\\\67x=134\\\\x=\frac{134}{67}\\\\x=2$

Total number of students and teachers who rode to the zoo in buses will be

$55(x+5)\\\\=55(2+5)\\\\=55\times 7\\\\=385$

Total number of students and teachers who rode to the zoo in vans will be

$12x\\\\=12\times 2=24$

Hence, there are 385 students and teachers who rode to the zoo in buses and 24 students and teachers who rode to the zoo in trains.

6 0

3 years ago

X^2 + 10x + 12 please help!!

earnstyle [38]

Answer:

This cannot be simplified any further. That is the simplest you'll get.

8 0

3 years ago