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malfutka [58]
3 years ago
8

How do you do this function (5a - 6)(2a - 1)

Mathematics
1 answer:
Studentka2010 [4]3 years ago
7 0

Answer:

10a² - 17a + 6

Step-by-step explanation:

Given

(5a - 6)(2a - 1)

Each term in the second factor is multiplied by each term in the first factor, that is

5a(2a - 1) - 6(2a - 1) ← distribute both parenthesis

= 10a² - 5a - 12a + 6 ← collect like terms

= 10a² - 17a + 6 ← in expanded form

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The ratio of adults to children on a train in 7:2. There are 245 adults on the train. Find the total number of people on the tra
Kruka [31]

Answer:

315 people

Step-by-step explanation:

Using the given ratio, we can figure out the number of children on the train by doing cross multiplication.

Let x = # of children on train.

7/2 = 245/x

7x = 490

x = 70 children

The total number of people = 70 + 245 = 315 people total

If you would like more help on math or other subjects for FREE, check out growthinyouth.org.

5 0
3 years ago
Step by step PLEASE!!!
blondinia [14]
F(x) = 3x^2+6x-2

= 3(x^2+2x-2/3)
= 3(x^2 +2x + 1 - 1 - 2/3)
= 3((x+1)^2 - 1 - 2/3)
= 3((x+1)^2 -5/3))
= 3(x+1)^2 - 5

So our function is in the form:

f(x) = 3(x+1)^2 - 5
where a = 3, h = -1, k = -5
7 0
3 years ago
Fedex typically deleviers 2,400 packages per day and uses 75 trucks for delivery. If the number of trucks used per day is propor
irina1246 [14]

Answer:

A

Step-by-step explanation:

8 0
3 years ago
A restaurant adds a 20% tip to the bills of parties of 6 or more people. Suppose a server waits on five such tables. The bill
castortr0y [4]

Answer:

$218.70

Step-by-step explanation:

You need to first convert the percentage to the decimal.

20% = 0.2

Now, you need to find 20% of each bill by multiplying each bill by 0.2.

0.2(185.45) + 0.2(205.20) + 0.2(195.05) + 0.2(245.80) + 0.2(262.00)

Because of the distributive property, you can add up the bills and multiply the sum by 0.2.

0.2(185.45 + 205.20 + 195.05 + 245.80 + 262.00)

0.2(1093.50)

218.7

The waiter made $218.70 in tips.

4 0
3 years ago
What is the median of this set of data: 10, 11, 12, 12, 15, 19, 20, 21, and 22? Express your answer as an integer.
Rama09 [41]
15, median is the number in the middle, (i.e. median of 3, 4, 8, 9, 10, is 8.)
4 0
3 years ago
Read 2 more answers
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