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Sloan [31]
3 years ago
13

Simplify (4x+5y)(2x-3y) +3xy please

Mathematics
1 answer:
Anettt [7]3 years ago
5 0
8x^2+xy-15y^2

If you need to show work I can put it in the comments :)
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Calculate the average (arithmetic mean) of the list of numbers shown in the table. (rounded to the nearest tenth A) 10.1 B) 11.0
Rufina [12.5K]

Answer:

C.

Step-by-step explanation:

When we add up all the numbers we get 111 then we divide it by 10 which gives us 11.1. since we have no value to round to the tenths place, the answer stays the same.

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2 years ago
A rock is thrown at 0 seconds from a height of 6 feet. If the parabola representing the height as a function of time has a verte
Korolek [52]

Answer:

The correct option is;

The graph will have a height of 6 feet at 16 seconds

Step-by-step explanation:

The given parameters are;

The start time for throwing the rock = 0 s

The height from which the rock is thrown = 6 ft

The vertex of the parabola = 8 seconds

Given that the vertex is the axis of symmetry, then the time it takes the rock to reach the vertex (8 seconds) from the point (0, 6) will be the same time it takes the rock to reach the point on the other side of the parabola at the same 6 feet which will then have coordinates (8 + 8, 6) or (16, 6) which will be 6 feet in 16 seconds.

3 0
3 years ago
9th grade- Point slope of line. Please explain how to do this, I got it wrong. I need an explanation cause I haven’t done it in
Andrei [34K]

Answer:

The answer would be C

Step-by-step explanation:

You were going in the right direction but the problem was that you needed to subtract and not add.  The formula should be y-y1 / x-x1 iirc. Hope this helped.

4 0
2 years ago
By which angle measures can the regular pentagon be rotated so it maps onto itself?
vazorg [7]

Answer:

hi there the answer is 72

Step-by-step explanation:

sorry but my work is on a piece of paper in front of me

5 0
2 years ago
3.
Nana76 [90]

Answer:

no I do not agree, Because it doesn't make since

6 0
2 years ago
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