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WITCHER [35]
2 years ago
13

Please solve the first three question with explanation ​

Mathematics
1 answer:
Lilit [14]2 years ago
6 0

Answer:

first one is b, second one is c

Step-by-step explanation:

3-4x<=11

-4x<=11-3

-4x<=8/:(-4)

x>=-2

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Please help me out!​
seropon [69]

Answer:

Second option

Third option

Fourth option

Step-by-step explanation:

We have the following quadratic function

f(x) =(x-1)(x+7)

Use the distributive property to multiply the expression

f(x) =x^2+7x-x-7

f(x) =x^2+6x-7

For a function of the form f (x) = ax ^ 2 + bx + c the x coordinate of the vertex is:

x =-\frac{b}{2a}

Then in this case the coordinate of the vertex is:

x =-\frac{6}{2(1)}

x =-3

To obtain the y coordinate of the vertex we evaluate the function at x = -3

f(-3) =(-3)^2+6(-3)-7

f(-3) =9-18-7

f(-3) =-16

Then the vertex is:  (-3, -16)

We can see in the graph that the zeros of the function are x=1 and x=-7

Then the function is decreasing from -∞ to -3 and then it is increasing from -3 to ∞

The function is positive for x and x> 1

The correct answers are:

Second option

Third option

Fourth option

7 0
3 years ago
Hadley’s softball team has a phone tree in case a game is canceled. The coach calls 3 players. Then each of those players calls
Setler [38]
           1                                2                            3
   1      2        3           1        2       3            1       2      3
123   123   123       123   123   123       123  123  123
3          3        3            3      3           3          3       3        3
3(9)
27
5 0
3 years ago
What is 46785392+78 ?
worty [1.4K]
The answer is 46,785,470
7 0
3 years ago
Read 2 more answers
Determine the value of y.
Anon25 [30]

Answer:

i think it's (C) 4.8

\frac{5}{5+3} = \frac{8}{8 + y}

8 0
3 years ago
Read 2 more answers
If the area of Bianca’s rectangular backyard patio is represented by the expression x2−18x + 81, and the length of the patio is
frosja888 [35]

Answer:

a square backyard with width (x - 9)

Step-by-step explanation:

x²−18x + 81 = x² - (2 x 9) x + 9² = (x - 9)²

width = area / length = (x - 9)² / (x - 9) = x - 9

Length = width

This is a square backyard

4 0
3 years ago
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