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nalin [4]
1 year ago
13

The table shows the approximate height of a projectile x seconds after being fired into the air. Which equation models the heigh

t, y, x seconds after firing? y = –10(x)(x – 5) y = 10(x)(x – 5) y = –10(x – 5) y = 10(x – 5)The table shows the approximate height of a projectile x seconds after being fired into the air.
Which equation models the height, y, x seconds after firing?

y = –10(x)(x – 5)
y = 10(x)(x – 5)
y = –10(x – 5)
y = 10(x – 5)
Mathematics
2 answers:
antoniya [11.8K]1 year ago
8 0

HELLLOOOO, the answer is A..............goodbye

jeka941 year ago
4 0
Data on the missing table.
time (seconds)  x ; 0   1    2     3    4     5
height (meters) y ; 0  40  60  60  40  0
        
We simply substitute the values of x and y to see if they are equal.
x = 2 ; y = 60
y = -10(x) (x-5)
60 = -10(2) (2-5)
60 = -20 (-3)
60 = 60    CORRECT

y = 10(x) (x-5)
60 = 10(2) (2-5)
60 = 20 (-3)
60 = -60  INCORRECT

y = -10(x-5)
60 = -10(2-5)
60 = -10(-3)
60 = 30  INCORRECT

 y = 10(x-5)
60 = 10(2-5)
60 = 10(-3)
60 = -30 INCORRECT

The equation that models the height,y, x seconds after firing is y = -10(x) (x-5)
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One factor of the polynomial 2x^3 - 3x^2 - 3x + 2 is ( x - 2 ). Which expression represents the other factor, or factors, of the
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2 |  2     -3       -3       2    

 

    <u>         4         2      -2          </u>

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Show a way to count from 170 to 410 using tens and hundreds. circle at least 1 benchmark number
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1 year ago
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You have a budget of $48. You want to buy fruit and granola bars. Fruit costs $4 per pound, and the granola bars are $1 each. Yo
zzz [600]

1)Define the variables you will use in your model.

Let

x------->total pounds of the fruit

y-------> the total number of granola bars

TC----> total cost

Tf------> total cost of the fruit

Tg----> total cost of the granola bars

2) Write an inequality representing the total cost of your purchase. (3 points)

a. Each pound of fruit costs $4. Write an expression that shows the total cost of the fruit. Use the variable you identified in question 1

Tf=4*x

b. Each granola bar costs $1. Write an expression that shows the total cost of the granola bars. Use the variable you identified in question 1.

Tg=1*y--------> Tg=y

c. Combine the expressions from parts a and b to write an expression for the total cost. Then use this expression to write an inequality that compares the total cost with the amount you have to spend.

TC=Tf+Tg

TC=4*x+y

inequality-------> 4x+y \leq 48

3. Write the inequality that models the number of granola bars you need to buy.

You need at least 10 granola bars

so

y\geq 10

4. Describe in words what each of your inequalities means

inequality 1

4x+y \leq 48

the total cost of fruits plus the total cost of granola bars must be less than or equal to 48 dollars

inequality 2

y\geq 10

5. Graph your system of inequalities.

using a graph tool

see the attached figure

6. Identify one point on the graph that represents a viable solution to the problem, and then identify one point that does not represent a viable solution.

Let

A-------> one point on the graph that represents a viable solution

B-------> one point on the graph that does not represent a viable solution

A(4,20)

x=4-------> total pounds of the fruit

y=20------> the total number of granola bars

check point A

substitute the values of x and y in the inequality 1

4x+y \leq 48

4*4+20\leq 48\\ 36\leq 48-------> is ok

substitute the values of x and y in the inequality 2

y\geq 10

20\geq 10--------> is ok

the point A represents a viable solution, because satisfies both inequalities

B(10,30)

x=10-------> total pounds of the fruit

y=30------> the total number of granola bars

check point B

substitute the values of x and y in the inequality 1

4x+y \leq 48

4*10+30\leq 48\\ 70\leq 48-------> is not a viable solution

substitute the values of x and y in the inequality 2

y\geq 10

30\geq 10--------> is ok

the point B is not a viable solution because does not satisfy the inequality 1

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A baby wriggled so much that weighing him at the clinic was a problem. So the doctor held the baby and stood on a scale. Then th
Pepsi [2]
X = <span>weight of the baby.
y = </span>weight of the doctor.
z = weight of the nurse.

x + y = 78 so y = 78 - x
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substitute y = 78 - x and z = 69 - x into x + y + z = 142

x + y + z = 142
x +78 - x + 69 - x = 142
-x + 147 = 142
-x = - 5
 x = 5

answer

<span>the weight of the baby was 5 kg</span>
6 0
2 years ago
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