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kolezko [41]
3 years ago
12

What is the factorization of the expression below 16x2 - 49?

Mathematics
2 answers:
mrs_skeptik [129]3 years ago
7 0

16 {x}^{2}  - 49 \\  =  {(4x)}^{2} -  {7}^{2}   \\  = (4x - 7)(4x + 7)
Vilka [71]3 years ago
4 0

Answer:

16 {x}^{2}  - 49 \\  =  {(4x)}^{2} -  {7}^{2}   \\  = (4x - 7)(4x + 7)

Step-by-step explanation:

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A traveler traveled for 6 hours and covered a distance of 520 km. He traveled the first 260 km by car, and the rest of the way b
Shkiper50 [21]

Answer:

57.78 km/hr

Step-by-step explanation:

Total time taken, t = 6 hours

Total distance covered, d = 520 km

Distance by car = 260

Distance by train = 520 - 260 = 260 km

Train speed = x

Car speed = 2x

Average speed speed = 3x /2

Speed = distance / time

1.5x = 520 / 6

9x = 520

x = 520 / 9

x = 57.777

Average speed of train = 57.78 km/hr

7 0
2 years ago
triangle abc has vertices at a(-2 3),B(0,3),c(-1,-1). Find the coordinates of the image after a reflection over the x-axis.
Crazy boy [7]

The new coordinates of the triangle after reflection from x-axis would be  A(-2, -3) , B(0, -3) and C( -1, 1 )

<u>Explanation:</u>

The vertices of the triangle are A(-2 3), B(0,3), C(-1,-1)

The reflection is over the x-axis.

When the reflection is along the x-axis, the coordinates of x does not change. However, the coordinates of y does change.

The negative value of y becomes positive and the positive value of y becomes negative.

Similarly,

A(-2, 3) would become A(-2, -3)

B(0, 3) would become B(0, -3)

C(-1, -1) would become C( -1, 1 )

Therefore, the new coordinates of the triangle after reflection from x-axis would be  A(-2, -3) , B(0, -3) and C( -1, 1 )

6 0
3 years ago
100 points
dusya [7]
A. This expression has 4 terms
B. The constants are -5, 3, 72 and 10
C. The third term is 72
D. The coefficient is y
3 0
2 years ago
Maria has $11 to buy fish for her aquarium. Each goldfish costs $2. How many goldfish can she buy? Do not include units in your
Semmy [17]

Answer:She can buy 5 goldfish.


Step-by-step explanation: If you divide the amount of money she has to spend by the cost of the goldfish;

$11/5 = 5.5

Since she can’t buy 5 and a half goldfish, she can only buy 5.


7 0
3 years ago
Read 2 more answers
Please answer all I'm so confused
Elena L [17]
Start, the first MAD is 2.5 go right, the second MAD is 3  MAD diagonal down, third is 6 go left. Fourth is MAD 9 straight down 2.8, Fifth diagonal up, 6th right  MAD 1.5 =Finish
7 0
3 years ago
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