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elixir [45]
3 years ago
14

How do you work out (7x+3)(7x-3)

Mathematics
1 answer:
spin [16.1K]3 years ago
7 0

We can solve this using the FOIL method.

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

= (7x * 7x) + (7x * -3) + (3 * 7x) + (3 * -3)

= 49x - 21x + 21x - 9

= 49x - 9

Hope This Helped! Good Luck!

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... the product of the width and the height...
irga5000 [103]

Step-by-step explanation:

The product of <em>a</em> and <em>b</em> is equal to <em>a · b.</em>

Let <em>w - width</em> and <em>l - length</em>, then the product of the width and the lenght is

<em>w · h = wh</em>

7 0
3 years ago
Ryan bought fishing gear, they cost 51.50,14.99,and 5.79. The sales tax was calculated by multiplying the total cost of the fish
wlad13 [49]

Answer: 76.28 approximately 76

Step-by-step explanation:

Ryan bought fishing gear for 51.50, 14.99 and 5.79.

Total fishing gear bought will be the addition of the 3 fishing gear.

51.50 + 14.99 + 5.79= 72.28

The sales tax is the multiplication of the total fishing gear by 0.05

= 72.28 × 0.05

= 3.614 which is approximately 4

Amount paid by Ryan will be

Total fishing gear + Sales tax

= 72.28 + 4

= 76.28 approximately 76.

3 0
3 years ago
Doune Punowing:
nataly862011 [7]

The length of pathway is 10 inches on map.

Step-by-step explanation:

Given,

Total distance = 350 miles

According to map,

1 inch = 35 miles

Let, x be the number of inches on map.

Therefore, using proportion;

Inch : mile :: inch : mile

1:35::x:350\\

Product of mean = Product of extreme

35*x=350*1\\35x=350\\

Dividing both sides by 35;

\frac{35x}{35}=\frac{350}{35}\\x=10

The length of pathway is 10 inches on map.

Keywords: Ratio, proportion

Learn more about proportions at:

  • brainly.com/question/5282516
  • brainly.com/question/5424148

#LearnwithBrainly

8 0
3 years ago
Describe how you would find how much grass seed is needed to cover a triangular plot of land
Papessa [141]

Answer: it the area of it

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Which expression is equivalent to the square root of 2 multipllied by 5 divided by 18
gayaneshka [121]

Answer:.75

Step-by-step explanation:

2x5/18 =.55555

.556 root is .745 the five makes the 4 round up

5 0
3 years ago
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