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3 years ago

Please help me with this one

Mathematics

1 answer:

ruslelena [56]3 years ago

3 0

Answer:

3.9375

Step-by-step explanation:

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What is a difference of squares with a factor of (3x + 7) ?

Inga [223]

Answer:

9x² - 49

Step-by-step explanation:

A difference of squares factors in general as

a² - b² = (a + b)(a - b)

Given (3x + 7) with a = 3x and b = 7

Then the other factor is (3x - 7)

(3x + 7)(3x - 7)

= (3x)² - 7²

= 9x² - 49

7 0

3 years ago

How would you convert a mass in centigrams to a mass in milligrams??

const2013 [10]

First let's start with the relationship between grams and centigrams and grams and milligrams.

1 gram = 100 centigrams
1 gram = 1000 milligrams

Because these two equations are equal, we can rewrite our equation as 100 centigrams = 1000 milligrams.

Now we divide by 100 to simplify our equation to 1 centigram = 10 milligrams.

With this simplified equation we see that we multiply the number of centigrams by 10 to find the equal number of milligrams.

5 0

4 years ago

Water drains from a barrel at a constant rate. The graph and table show how the amount of water in the barrel changes with time.

lana66690 [7]

Answer:

Option C is correct.

Step-by-step explanation:

We have been given the graph

The graph is not of exponential function

Therefore, option A and B are discarded.

Now, We can see the graph is starting from 37

And the difference between Amount of water from the table is 19-22 that is -3

So, the graph is arithmetic

So, applying the formula $a_n=a+(n-1)d$ ; d is common difference here we have d= -3

$a(n)=37-3(n-1)$

Therefore, option C is correct.

3 0

3 years ago

Jamal buys a new racing bicycle. Two shops charge the same price for the bicycle but offer different payment plans. Shop 1 requi

grandymaker [24]

Answer:

Shop 1 = $260 + $20m

Shop 2 = $140 + $30m

Step-by-step explanation:

m = number of months payments are made

Total payment made = down payment + monthly payment

Shop 1 requires $260 down and a monthly payment of $20.

Shop 1 = $260 + $20m

= 260 + 20m

Shop 2 requires $140 down and a monthly payment of $30.

Shop 2 = $140 + $30m

= 140 + 30m

The equations that represent the payments plans are:

Shop 1 = $260 + $20m

Shop 2 = $140 + $30m

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3 years ago

What is the least common denominator between 3/4 4/5 and 2/3

Dominik [7]

Answer:

The Least Common Denominator of 3/4, 4/5 and 2/3

Would be,

4 × 5 × 3 = 60

Hence,

60 is the L.C.D of 3/4, 4/5 and 2/3

3 0

3 years ago