MATHEMATICS MIDDLE SCHOOL

Help!!!!! I need help fast.

Answers

Answer 1

Answer:

Answer:

$(x + 3)^2 + (y- 2)^2 = 4$

Step-by-step explanation:

A circle which has center at point(a,b) on coordinate plane and its radius is r, then its equation is represented by

(x-a)^2 + (y-b)^2 = r^2

______________________________________

In the problem

we have

center as (-3,2) while radius is 2 units.

Thus, it equation can be written based on above discussion as

a = -3, b = 2 r =2

$(x-a)^2 + (y-b)^2 = r^2 \n(x-(-3))^2 + (y- 2)^2 = 2^2\n(x + 3)^2 + (y- 2)^2 = 4$

thus, correct choice is option third.

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Sherry bought 6 apples at 43¢ per apple. She then bought 4 oranges at 51¢ per orange. How much was her grocery bill?

Answers

Answer:

$4.62

Step-by-step explanation:

6x.43=2.58

4x.51=2.04

2.58+2.04=4.62

four dollars and 62 cents ($4.62)

Show how the following sequences is an arithmetic or not
please help me

Answers

Answer:

not arithmetic

Step-by-step explanation:

An arithmetic sequence has a common difference d between consecutive terms.

Given

$T_(n)$ = 2n² - 1

Substitute in n = 1, 2, 3, 4 to generate the first 4 terms of the sequence

$T_(1)$ = 2(1)² - 1 = 2 - 1 = 1

$T_(2)$ = 2(2)² - 1 = 8 - 1 = 7

$T_(3)$ = 2(3)² - 1 = 18 - 1 = 17

$T_(4)$ = 2(4)² - 1 = 32 - 1 = 31

check the difference between consecutive terms

7 - 1 = 6

17 - 7 = 10

31 - 17 = 14

The differences are not common hence not an arithmetic sequence

Sammi bought 2dozen valentines. How many valentines did sammi have left after giving 7/8 of them to her classmates

Answers

Dozen = 12

2 dozen

2x12=24

7/8 of 24

24 / 8 = 3
3 x 7 = 21
24- 21= 3

3 roses are left over

Two sides of a right triangle have lenghts of 72 cm and 97 cm.the third side is not the hypotenuse.how long is the third base?

Answers

Whenever someone says right triangle,
always think of $a^(2) + b^(2) =c^(2)$ first.

If the third side is not hypotenuse, it is either $a$ or $b$ , and it doesn't matter which one.

let's plug in what we have:
$72^(2) + b^(2) =97^(2)$
$b^(2) =97^(2) - 72^(2)$
$b^(2) =9409 - 5184$
$b = √(9409 - 5184)$
$b = √(4225)$
$b = 65$

Therefore, the third base is 65 cm.

Also, by the way, we know that 97cm is the hypotenus, as hypotenuse is always the longest side in right triangles.

A relationship that can be used to solve for the Time it takes for a bird to fly between two trees is A.speed*distance B.speed+distance C.speed/distance D.distane/speed

Answers

I think its C cause to solve for Speed its S=t/d

The floor inside the horse barn is 45 feet long and 20 feet wide . The barn has 2 floors ( an upstairs and downstairs ) and both floors has the same size . What is the total area for both floors of the barn

Answers

to find area we multiple length by width

20 times 45 is 900

then multiply that by 2 because there are two floors that are that size

900 times 2 is 1800

the total area for both floors is 1800 square feet

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