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2 years ago

PLEASE HELP!!!

Mathematics

2 answers:

AfilCa [17]2 years ago

7 0

The answers must be B

Ivenika [448]2 years ago

5 0

Answer:

Step-by-step explanation:

(Standard form is automatically in integers)

Multiply by 3 to take out the fraction

3y=2x+21

-2x -2x

-2x+3y=21

Standard form means Ax+By=C with positive A (usually--some people allow A to be negative).

Multiply by (-1)

2x-3y=-21

(Technically, that's the more correct answer, but since you don't have that choices, it's just the previous one.)

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Cotθ= tan30° find theta

scoundrel [369]

Answer:

Step-by-step explanation:

Cot is the same as 1/tan so:

$1/tan(theta) = tan(30)$

By rearranging the equation, we get:

$1/tan(30) = tan(theta)$

By taking the inverse tan, we get:

$theta = tan^-1 (1/tan(30)) =60$

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2 years ago

If Eggs and Toast cost $8.67, and they are 15% off, how much do they cost now?

Talja [164]

The eggs and toast cost $7.37

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2 years ago

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Solve the quadratic equation by completing the square.

vampirchik [111]

Answer:

x = -4.59, -7.41.

Step-by-step explanation:

x^2 + 12x + 34 = 0

(x + 6)^2 - 36 +34 = 0

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x + 6 = +/-√2

x = +/-√2 - 6

x = -4.59, -7.41

7 0

2 years ago

The punch bowl at felicia's party is getting low so she adds 12 cups of punch to the bowl two guests serve themselves 1.25 cups

Eduardwww [97]

2.75 cups were in the punch bowl before felicia refilled it .

<u>Step-by-step explanation:</u>

Here we have , the punch bowl at felicia's party is getting low so she adds 12 cups of punch to the bowl two guests serve themselves 1.25 cups and 2 cups and 2 cups of punch the punch bowl now contains 11.5 cups of punch . We need to find how many cups were in the punch bowl before felicia refilled it let n=number of cups bowl before felicia refilled it. Let's find out:

Initially we have , n number of cups of punch ! Than 12 additional cups were added , given below is the equation framed for the number of cups present:

⇒ $n+12$

Now , After this 1.25 and 2 cups were served by guests themselves and remaining cups were 11.5 i.e.

⇒ $11.5+1.25+2$

⇒ $14.75$

Equating both we get :

⇒ $n+12=14.75$

⇒ $n=14.75-12$

⇒ $n=2.75$

Therefore , 2.75 cups were in the punch bowl before felicia refilled it .

6 0

2 years ago

Question Progress

Anastaziya [24]

Answer: Please see explanation column for answer

Step-by-step explanation:

According to sequence 2, 6, 18, 54, 162

--we can see that it is a geometric sequence since to go from one term to the next requires us to multiply by 3 which is called the common ratio which is gotten by dividing the next by the previous.

ie term 2/ term 1= 6/2 = 3

term 3/ term 2= 18/6= 3

term 4/ term 3= 54/28= 3

term 5 / term 4= 162/54=3

term 6 will therefore be 162 x3 = 486

and term 7 = 486 x 3=1,458 and so on

Recall that nth term of GP is

Tn = ar^n-1

Where a= first term

r= common ratio

n= term

such that to easily find particular term, we plug in the values and calculate

for example the 10th term of the above sequence

Tn = ar^n-1

= 2 X 3 ^(10-1)

2 X 3^9

T10 =39,366

4 0

3 years ago