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Tasya [4]
3 years ago
7

Evaluate the expression -4x+7 if x= -1

Mathematics
1 answer:
xxTIMURxx [149]3 years ago
7 0

Answer:

11

Step-by-step explanation:

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<img src="https://tex.z-dn.net/?f=f%28x%29%20%3D%20%20%7Bx%7D%5E%7B3%20%7D%20%20%2B%20%20%7B3x%7D%5E%7B2%7D%20-%209x%20%2B%205"
9966 [12]

Answer:

f(1) =  {(1)}^{3}  + 3 {(1)}^{2}  - 9(1) + 5 \\ (x - 1) = 0 \rightarrow \: x = 1 \\\frac{{x}^{3 } + {3x}^{2} - 9x + 5}{x - 1}  =  {x}^{2}  + 4x - 5 \\ (x + 5)(x - 1) = 0 \\ x =  - 5 \: or \: x = 1 \\   \color{red}\boxed{x_{1} = 1} \\\color{yellow} \boxed {x_{2} = 1} \\    \color{green}\boxed{x_{3} =  - 5}

The answer would be C and F

7 0
2 years ago
The Teknomite Corporation must appoint a president, chief executive officer (CEO), a chief operating officer (COO). It must also
UNO [17]

Answer:

336 ways ;

56 ways

Step-by-step explanation:

Number of ways to have the officers :

Number of qualified candidates, n = 8

Number of officer positions to be filled = 3

A.)

Using permutation (since the ordering matters):

nPr = n! ÷(n-r)!

8P3 = 8! ÷ (8-3)!

8P3 = 8! ÷ 5!

8P3 = (8*7*6)

8P3 = 336 ways

B.) Different ways of appointing committee: (ordering doesn't count as officers can also be appointed)

Using the combination relation :

nPr = n! ÷(n-r)!r!

8C3 = 8! ÷ (8-3)! 3!

8C3 = 8! ÷ 5!3!

8C3 = (8*7*6) ÷ (3*2*1)

8C3 = 336 / 6

8C3 = 56 ways

3 0
3 years ago
ε = {x: 2 x 30, x is an integer}, M = {even numbers}, P = {prime numbers}, T = {odd numbers} Find: I) MUP ii) M - T iii) P(MT) i
dusya [7]

Answer:

i hope this helps and its clear !

6 0
3 years ago
Which of the following measurements is greater?<br><br> 150 quarts<br> 200 pints
vredina [299]
A quart contains 2 pints, so 150 pints is equal to 300 quarts. Therefore 150 quarts is bigger
4 0
4 years ago
Read 2 more answers
To paint interior​ walls, a person charges 50¢ per square foot plus the cost of the paint. For a recent​ job, the paint cost ​$1
KatRina [158]

Answer:

750 ft²

Step-by-step explanation:

.Given :

Charge per ft² = 50¢ = $0.5

Total cost = ((charge per ft² * number of ft²) + cost of paint)

Given that :

Paint cost = $100

Total cost = $475

Number of ft² = x

Plugging values into the equation :

475 = (( 0.5 * x) + 100)

475 = 0.5x + 100

475 - 100 = 0.5x

375 = 0.5x

x = 375 / 0.5

x = 750 ft²

6 0
3 years ago
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