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3 years ago

Please help guys plleaasee

Mathematics

1 answer:

Nitella [24]3 years ago

5 0

Answer: 21

Step-by-step explanation:

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Help me plz

irakobra [83]

Answer:

I could do 1 and 3

1) 2x-3y=-2 ....1

2x+y=14......2

=-4y=-16

y=4

Substitute (y=4) into equation 1

2x-3 (4)=-2

2x-12=-2

2x=-2+12

2x=10

×=5

3) 5x+5y=20....1

-3x+5y=4......2

=8x=16

x=2

Substitute (x=2) into equation 1

5 (2)+5y=20

10+5y=20

5y=20-10

5y=10

y=2

5 0

3 years ago

Read 2 more answers

The area of a square patio is 225 square feet. What is the perimeter of the patio

Liula [17]

STEP 1:
find the length of the sides of the square

AREA FORMULA (for a square)
x= side

A=x^2

225=x^2
take square root of both sides

15 feet= x

STEP 2:
find perimeter

PERIMETER FORMULA (for a square)

x= side of square

P= 4x
use x value from step 1

P= 4(15 ft)
P= 60 feet

ANSWER: The perimeter is 60 feet.

Hope this helps! :)

8 0

3 years ago

DJ Jacqueline is making a playlist for a friend; she is trying to decide what 15 songs to play and in what order they should be

11111nata11111 [884]

Answer:

$P=4.41205084*10^2^1$

Step-by-step explanation:

From the ques ton we are told that

Total amount N=15

Choices within 10 pop, 25 reggae, 10 blues

Generally for equal amount in her play list she's mathematically Going to have 5 of each kind Pop,Reggae,Blues

Therefore

Let the amount of differnt playlist be given as P

$P=^1^0C_5*^2^5C_5*^1^0C_5*15!$

$P=252*53130*252*1307674368000$

$P=4.41205084*10^2^1$

Therefore $P=4.41205084*10^2^1$ different playlists are possible

8 0

3 years ago

Find the rectangular coordinates of the point with the polar coordinates ordered pair negative 7 comma 5 pi divided by 3.

olchik [2.2K]

$\bf \begin{array}{clclll}
(-7&,&\frac{5\pi }{3})\\
\uparrow &&\uparrow \\
r&&\theta
\end{array}\qquad 
\begin{array}{clclll}
(x&,&y)\\
\downarrow &&\downarrow \\
r\cdot cos(\theta)&&r\cdot sin(\theta)
\end{array}$

so.. to get the x,y coordinates, or rectangular ones, get the cosine and sine of that angle, and multiply it times the "r"adius

6 0

3 years ago

Whats the answer! I am horrible with linear equations

Stella [2.4K]

Has to be B, because it’s the only one that touches the point 2 on the x axis

3 0

2 years ago