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3 years ago

Help like I do not understand math at all

Mathematics

2 answers:

Fynjy0 [20]3 years ago

7 0

Parts A:There will be 57 rows
Part B: because 513 divided by 9 equals 57
Part C:equals 25 because if you divide 250 by 5 and then divide it by 2 u get 25

yKpoI14uk [10]3 years ago

5 0

Answer:

Step-by-step explanation:

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show that thw roots of the equation (x-a)(x_b)=k^2 are always real if a,b and k are real. Please I really need help with this

VLD [36.1K]

Answer:

see explanation

Step-by-step explanation:

Check the value of the discriminant

Δ = b² - 4ac

• If b² - 4ac > 0 then roots are real

• If b² - 4ac = 0 roots are real and equal

• If b² - 4ac < 0 then roots are not real

given (x - a)(x - b) = k² ( expand factors )

x² - bx - ax - k² = 0 ( in standard form )

x² + x(- a - b) - k² = 0

with a = 1, b = (- a - b), c = -k²

b² - 4ac = (- a - b)² + 4k²

For a, b, k ∈ R then (- a - b)² ≥ 0 and 4k² ≥ 0

Hence roots of the equation are always real for a, b, k ∈ R

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3 years ago

How is 0.009 and 0.9 related

Marysya12 [62]

They are related as they are both decimals, and carry a 9. They are therefore 90th of some strange

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3 years ago

A grocery store sells a bag of 4 oranges for $3.64. How much would it cost for 6

Sergeu [11.5K]

Answer: $6.54

Step-by-step explanation:

The price of one orange is $1.09

The price of 4 oranges is $3.64

The price of 6 oranges is $6.54

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3 years ago

Read 2 more answers

Jill and Erika made 5 gallons of lemonade for their lemonade stand.

julia-pushkina [17]

Part 1: 4 quarts in a gallon
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Part 2: 20 * 2 = 40
They will make $40.00

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3 years ago

I need help I don't know how to do this

Sidana [21]

Answer:

$x\geq 23$

Step-by-step explanation:

This equation can simply be solved by adding 15 to both sides.

To graph, draw a closed point at the center of the line and darken the area to the right of it.

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3 years ago