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Stolb23 [73]
3 years ago
9

What is the product of the expression?(a-3b) (2a+2b)

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
8 0
I think is

2a2 + 2ab - 6ab + 6b2

2a2 + 6b2 - 4ab
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All 231 students in math club went on a field trip some rode in vans that held 7 people and some rode on buses that held 25 peop
MariettaO [177]

Answer:

8 vans

7 buses

Step-by-step explanation:

Let there be "b" buses

and "v" vans

Since 7 people is the capacity of vans, the total capacity is

7v

Also, since 25 people is the capacity of 1 bus, the total capacity is

25b

In total 231 people, so we can write our first equation as:

7v + 25b = 231

Now, we know there are 15 vehicles (bus + vans) in total, so we can write our 2nd equation as:

v + b = 15

Now, we solve for v and b. Let's solve the 2nd equation for v and substitute that into 1st and solve for b first:

v + b = 15

v = 15 - b

Now,

7v + 25b = 231\\7(15-b) + 25b = 231\\105-7b+25b=231\\18b=126\\b=7

Hence, there are 7 buses

Since 15 vehicles in total, the number of vans is:

15 - 7 = 8 vans

So,

8 vans

7 buses

8 0
3 years ago
What is the number 0.000706 written in scientific notation?
Alex17521 [72]

Answer:

7.6 x 10^-4

Step-by-step explanation:

5 0
3 years ago
So, the area <br> Find the area of the figure of
ch4aika [34]

Answer:

The area of the figure is 117m²

Step-by-step explanation:

In this problem, you have two shapes. One shape is a rectangle. The other shape is a triangle.

Area of a rectangle = b*h = 9*7 = 63

Area of a triangle = \frac{1}{2}(b*h) =

Since there are two triangles, you will multiply the area of the one triangle in the figure by 2.

27*2 = 54

Now, you add up the areas!

54 + 63 = 117

So, the area of the figure is 117m²

7 0
3 years ago
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Korolek [52]

Answer:

will have a trillionare by that time

Step-by-step explanation:

3 0
3 years ago
I'LL GIVE BRAINLIEST:<br><br><br><br>B or C
Sidana [21]

Answer:

b

Step-by-step explanation:

is the proper answer

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3 years ago
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