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Alekssandra [29.7K]
3 years ago
9

While attempting to solve the equation , Hazel made an error. Her work is shown to the right. Explain the mistake, and provide t

he correct answer.

Mathematics
1 answer:
balu736 [363]3 years ago
3 0

Answer:

Step-by-step explanation:

X=-11 because,

Step 1: Simplify both sides of the equation.

x

2

+

4

x

=

77

Step 2: Subtract 77 from both sides.

x

2

+

4

x

−

77

=

77

−

77

x

2

+

4

x

−

77

=

0

Step 3: Factor left side of equation.

(

x

−

7

)

(

x

+

11

)

=

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Will make you brainlistt if it is right
dexar [7]

Answer:

The amount of weeks is your independent variable, or X variable, and the height is you dependents variable.

Step-by-step explanation:

I don't know what this question is about so I'm gonna use plants as an example. The amounts of weeks that you are growing a plant is not dependent on anything. Nothing can cause change to that variable, so it would be your X. The height that your plant has grown DOES depend on how long you've grown it, so the amount of weeks, making it your Y variable.

3 0
3 years ago
The times of the runners in a marathon are normally distributed, with a mean of 3 hours and 50 minutes and a standard deviation
balu736 [363]

Answer: 0.16

Step-by-step explanation:

Given that the run times provided are normally distributed ;

Mean(x) of distribution = 3 hours 50 minutes

Standard deviation(s) = 30 minutes

The probability that a randomly selected runner has a time less than or equal to 3 hours 20 minutes

3 hours 20 minutes = (3 hrs 50 mins - 30 mins):

This is equivalent to :

[mean(x) - 1 standard deviation]

z 1 standard deviation within the mean = 0.84

z, 1 standard deviation outside the mean equals:

P(1 - z value , 1standard deviation within the mean)

1 - 0.8413 = 0.1587

= 0.16

7 0
3 years ago
Here are the ingredients for making pineapple sorbet for 6 people. 800g 4 egg whites 1/2 lemon 100g cater sugar Ann makes pineap
zhuklara [117]
She would use 1200g of pineapple.
6 0
3 years ago
Which situation can be represented by the equation 4d + 5 = 29?
lys-0071 [83]

Answer:

d=6

Step-by-step explanation:

subtract 5 from both sides

then simplify what you get

then divide both sides by 4

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4 0
3 years ago
Use each table to find the requested ratio. ITEM BANK: Move to Bottom <br> 1:2 1:4 1:5 2:1 4:1 5:1
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Answer:

See below ~

Step-by-step explanation:

<u>Table 1</u>

⇒ Side length : Perimeter = <u>1 : 4</u>

⇒ Perimeter : Side length = <u>4 : 1</u>

<u></u>

<u>Table 2</u>

⇒ Radius : Diameter = <u>1 : 2</u>

⇒ Diameter : Radius = <u>2 : 1</u>

<u></u>

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⇒ Number of tables : Number of people = <u>1 : 5</u>

3 0
2 years ago
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