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Tom [10]
4 years ago
5

Can someone help me and tell me the steps plzz​

Mathematics
1 answer:
adell [148]4 years ago
5 0

Answer:

A

Step-by-step explanation:

f(x) = 7x² - 15x + 2

A) f(1) = 7*1² - 15*1 +2 = - 6

f(1.5) = 7*(1.5)² -15*1.5 + 2 = - 4.75

B) f(2.2) = 7*(2.2)²-15*(2.2)+2 = 2.28

C) f(1) = 7*1² - 15*1 +2 = - 6

f(1) = 7*2² - 15*2 +2 = 0

D) not for all real numbers because we already have

f(2.2) = 7*(2.2)²-15*(2.2)+2 = 2.28 that is positive.

You might be interested in
Water flows through a pipe at a rate of 0.12 litres per second.
katrin2010 [14]

Answer:

250 seconds

Step-by-step explanation:

(0.12/1 = 30/x)

0.12x = 30

x = 250

8 0
3 years ago
I need help with this:
Brut [27]
By the commutative property of addition, the answer you got
  c = -b+5a
is identical to selection ...
  D. c=5a-b



The commutative property tells you the order of addition doesn't matter, so
  (-b)+(5a) = (5a)+(-b) = 5a-b
(This is one of the reasons we study these properties.)
3 0
4 years ago
Please help for #10 both parts will give 30 points!!!!!
Andreas93 [3]
8x6= 48 (not necessary to divide by 8 since you'd have to multiply it by 2 anyway because there are 2 triangles)
6x12=72
10x12=120
12x8=96

48+72+120+96=336

336cm^2 is the answer
5 0
3 years ago
Whats the solution to the system of inequalities? <br> -3x-y+z=6 <br> -3x-y+3z=0<br> -3z=3
Naya [18.7K]

Answer:

  This system of equations has <em>no solution</em>. It is inconsistent.

Step-by-step explanation:

The last equation tells you z = -1.

Substituting this value for z in the other two equations allows them to be written as ...

  -3x -y = 7

  -3x -y = 3

There are no values of x and y that can make both these equations true.

3 0
3 years ago
1433.4 to the nearest 10
frozen [14]

Answer:

14,334 actually that might not be the answer im just thinking that because the 4 is in the tenths place and ur rounding that u would make it into a whole number

4 0
3 years ago
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