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Morgarella [4.7K]
2 years ago
10

I’m new to this app! And i really need help.. PLEASE HELP!!!!!

Mathematics
1 answer:
aalyn [17]2 years ago
8 0

Step-by-step explanation:

a) x^2 - 5x + 4 = (x - 1)(x - 4)

b) x^2 - 10x + 9 = (x - 1)(x - 9)

c) x^2 - 16x + 64 = (x - 8)^2

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cuanto pagaríamos por un libro cuyo precio es de $25 si le aplicamos un descuento del 25% cuanto dinero ahorramos
kotegsom [21]

Tenemos precio de lista de $25 para el libro.

Si aplicamos un descuento del 25%, este descuento representa:

D=(\frac{25}{100})\cdot25=0.25\cdot25=6.25

Ahorramos $6.25.

El precio que pagamos el libro es $18.75.

P=L-D=25-6.25=18.75

4 0
9 months ago
Find the measures of an interior angle and an exterior angle of a regular 16-gon
Anastasy [175]

Answer:

2520°

Step-by-step explanation:

The sum of the angles in any triangle is 180°

shape. sides. triangles. sum int angles.

triangle. 180×1=180°

quad. 180×2=360°

pentagon. 180×3=540°

n-sides. n( n−2) 180(n−2)

16-sides. 180×14=2520°

7 0
3 years ago
What is purpose of the underlined part of the sentence​
shutvik [7]
I can’t see what the underlined word is
3 0
2 years ago
Calculate average rate of change between n=1 and n= 11
crimeas [40]

Answer:

The ordered pairs for 1 and 3 are:

(1,2) (3,8)

Now use the slope formula:

(y2-y1)/(x2-x1)

(8-2)/(3-1)= 6/2 = 3

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Each of the following data sets has a mean of x = 10. (i) 8 9 10 11 12 (ii) 7 9 10 11 13 (iii) 7 8 10 12 13 (a) Without doing an
stepladder [879]

Answer:

Step-by-step explanation:

Given are 3 data sets with values as:

(i) 8 9 10 11 12   ... Mean =10

(ii) 7 9 10 11 13    ... Mean =10

(iii) 7 8 10 12 13   ... Mean =10

We see that  data set shows mean deviations as

(i) -2 -1 0 1 2  

(ii) -3 -1 0 1 3    

(iii) -3 -2 0 2 3  

Since variance is the square of std deviation, we find that std deviation is larger when variance is larger.

Variance is the sum of squares of (x-mean).  Whenever x-mean increases variance increases and also std deviation.

Hence we find that without calculations also (i) has least std dev followed by (ii) and then (iii)

(i) (ii) (iii) is the order.

b) Between (i) and (ii) we find that 3 entries are the same and 2 entries differ thus increasing square by 9-4 twice.  But between (ii) and (iii) we find that

increase in square value would be 4-1 twice. Obviously the latter is less.

6 0
3 years ago
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