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3 years ago

Helpppppppppp. No links

Mathematics

2 answers:

Mice21 [21]3 years ago

8 0

So when doing area you wanna multiply the numbers in this example, 1/2*3/4= 3/8

It would either be 3 or 4, but I would go with addition with fractions

I think the answer would be the 3rd one

(I might be wrong, but all i know is that its nit the 1st or 2nd choice)

I dont think its subtraction, since when I did it I got 1/4

So it would have to be the 3rd

(sorry if this didn't help, but at least you can understand)

jonny [76]3 years ago

4 0

Answer:

Step-by-step explanation:

ayooo u on a real test

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Solve this pleasee!!!!!!!!!!!

Sholpan [36]

Answer:

1) Solution (2,-3)

2) Solution (-1, $-\frac{3}{2}$ )

3) Solution ( $\mathbf{-\frac{1}{2},-\frac{5}{2}}$ )

Step-by-step explanation:

We need to solve equations using elimination

1) $2x+2y=-2\\3x-2y=12$

Let:

$2x+2y=-2--eq(1)\\3x-2y=12--eq(2)$

Adding both equations:

$2x+2y=-2\\3x-2y=12\\--------\\5x=10\\x=\frac{10}{5}\\x=2$

We get value of x = 2

Now, put value of x into equation 1 to find value of y

$2x+2y=-2\\Put\:x=2\\2(2)+2y=-2\\4+2y=-2\\2y=-2-4\\2y=-6\\y=-6/2\\y=-3$

So, we get y = -3

Solution (2,-3)

2) $4x-2y=-1\\-4x+4y=-2$

Let:

$4x-2y=-1--eq(1)\\-4x+4y=-2--eq(2)$

Adding both equations

$4x-2y=-1\\-4x+4y=-2\\------\\2y=-3\\y=\frac{-3}{2}$

We get: y= -3/2

Now find value of x by putting value of y in eq(1)

$4x-2y=-1\\Put\:y=\frac{-3}{2}\\4x-2( \frac{-3}{2})=-1\\4x+3=-1\\4x=-1-3\\4x=-4\\x=\frac{-4}{4}\\x=-1$

We get x = -1

Solution (-1, $-\frac{3}{2}$ )

3) $x-y=2\\x+y=-3$

let:

$x-y=2--eq(1)\\x+y=-3--eq(2)$

Add both equations:

$x-y=2\\x+y=-3\\-----\\2x=-1\\x=-\frac{1}{2}$

We get x = -1/2

Now, put value of x in equation 2

$x+y=-3\\-\frac{1}{2}+y=-3\\y=-3+ \frac{1}{2}\\y=\frac{-6+1}{2}\\y=\frac{-5}{2}$

We get y = -5/2

Solution ( $\mathbf{-\frac{1}{2},-\frac{5}{2}}$ )

7 0

3 years ago

Jon drives at a constant rate of 60 miles per hour. He’s taking a trip and needs to drive 480 miles. Determine how many hours hi

Ne4ueva [31]

Answer:

8 hours.

Step-by-step explanation:

60x8=480

Hope this helps!

3 0

3 years ago

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A wheel has a diameter of 21 inches. Approximately how far does it travel in 3 revolutions? A. 63 in. B. 65.94 in. C. 98.91 in.

Paul [167]

If a wheel makes a full turn, it will have traveled the entire distance around that wheel. After 3 revolutions, it should have traveled 3 times its circumfrence.
The circumfrence of a circle is equal to the diameter times pi. (about 3.14)
21 × 3.14 = 65.94 = circumfrence = 1 revolution
3 revolutions = = 65.94 × 3 = D. 197.82 in.

8 0

3 years ago

1. Multiple choice: Which irrational number is between 4 and 5.

Marizza181 [45]

Answer:

1. b, 20

Step-by-step explanation:

1. Irrational numbers between 4 and 5 are √17, √18,√19,√20,√21,√22,√23 ,√24.

5 0

3 years ago

Janie skates at the local skating rink for about 2.4 hours every day. If the skating rink is open 54 days a year, about how many

son4ous [18]

About 129.6 hours every single year

4 0

3 years ago

Read 2 more answers