MATHEMATICS HIGH SCHOOL

Select the polynomial that is a perfect square trinomial.9x2 + 9x + 1

36b2 − 24b + 8

16x2 + 24x + 9

4a2 − 10a + 25

Answers

Answer 1
Answer:

Answer: (c)  16x^(2)+24x+9.


Step-by-step explanation:

(a) 9x^(2) +9x+1 cannot be further factorised, so this is not correct option.

(b) 36b^(2)-24b+8 also cannot be expressed as factors, and hence this is too not correct.

(c) 16x^(2)+24x+9=({4x+3} )^2, the correct one.

(d) 4a^(2)-10a+25 cannot be factorised, so its not correct.

Thus, (c) 16x^(2)+24x+9 is the correct option.
Answer 2
Answer: Hello,

Answer C

16x²+24x+9=(4x+3)²

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Your video membership cost $14 per month for 10 video rentals. Each additional video rental is $2. Write in equation into variables that represent the cost of your video rentals.

Answers

Answer:the equation that represents the cost of your video rentals is y = 14 + 2(x - 10)

Step-by-step explanation:

Let x represent the number of video rentals that you made in a month.

Let y represent the total cost of x video rentals that you make in a month.

Your video membership cost $14 per month for 10 video rentals. Each additional video rental is $2. Therefore, the equation that represents the cost of your video rentals would be

y = 14 + 2(x - 10)

Where x - 10 is representing additional video rental above 10

Prices were recorded for all the loaves of bread in a supermarket, the mean price for a loaf of bread was $1.37 with a standard deviation of $0.67, Find the probability that if 13 loaves are selected the mean price is less than $1.00. A 0.0032


B 0.5643


C 0.9105


D 0.0233

Answers

Answer:

z = (1-1.37)/((0.67)/(√(13))) = -1.991

And we want this probability:

P(z<-1.991)

And using the normal standard distribution or excel we got:

P(z<-1.991)= 0.0233

And the best option would be:

D 0.0233

Step-by-step explanation:

For this case we have the following parameters:

\mu = 1.37, \sigma =0.67

And we select a sample size of n=13. And we want to find this probability:

P(\bar X <1)

We can assume that the distribution for this case is normal and then we can use the z score formula given by:

z= (\bar X -\mu)/((\sigma)/(√(n)))

And if we replace the data given we got:

z = (1-1.37)/((0.67)/(√(13))) = -1.991

And we want this probability:

P(z<-1.991)

And using the normal standard distribution or excel we got:

P(z<-1.991)= 0.0233

And the best option would be:

D 0.0233

Given ƒ(x) = 8x + 25, find x when ƒ(x) = 9.
A) -2
B) -1
C) 0
D) 2

Answers

A)-2
9=8x+25
-16=8x
X=-2

The local sweatshirt store charges a printing fee of $35 and then $7 per sweatshirt printed. If a company ordered 25 sweatshirts, how much money did the total order cost?

Answers

210$

Step-by-step explanation:

7×25=175+35=210$

I really need help on geometry

Answers

For example, exc. 15.

x + y = 10 and 6/x = 9/y; You need y!

=> x = 10 -y and 9x = 6y => 9(10-y) = 6y => 90 - 9y = 6y => 15y = 90 => y = 6.

The _______ is used to express absolute temperatures in the English system of measurement. A. Celsius scale
B. Fahrenheit scale
C. Rankine scale
D. Kelvin scale

Answers

For america it's Fahrenheit
for most of the rest of the world it is Celsius
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