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3 years ago

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PLEASE HELPP ITS QUIZ: if the product 2x+1 and 3x-4 were placed in ax^2+bx+c form, what would the value of a+b+c equal? FULL EXP

LANATION PLEASE 20 POINTS!!

1 answer:

GuDViN [60]3 years ago

5 0

Answer:

64

Step-by-step explanation:

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Solve for y 16y^2-25=0

Pepsi [2]

Answer:

$\large\boxed{x=-\dfrac{5}{4}\ \vee\ x=\dfrac{5}{4}}$

Step-by-step explanation:

$16y^2-25=0\\\\METHOD\ 1:\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\16=4^2\ \text{and}\ 25=5^2\ \text{therefore we have}\\\\4^2y^2-5^2=0\\\\(4y)^2-5^2=0\\\\(4y-5)(4y+5)+0\iff4y-5=0\ \vee\ 4y+5=0\\\\4y-5=0\qquad\text{add 5 to both sides}\\4y=5\qquad\text{divide both sides by 4}\\\boxed{y=\dfrac{5}{4}}\\\\4y+5=0\qquad\text{subtract 5 from both sides}\\4y=-5\qquad\text{divide both sides by 4}\\\boxed{x=-\dfrac{5}{4}}$

$METHOD\ 2:\\\\16y^2-25=0\qquad\text{add 25 to both sides}\\\\16y^2=25\qquad\text{divide both sides by 16}\\\\y^2=\dfrac{25}{16}\to y=\pm\sqrt{\dfrac{25}{26}}\\\\y=-\dfrac{\sqrt{25}}{\sqrt{16}}\ \vee\ x=\dfrac{\sqrt{25}}{\sqrt{16}}\\\\\boxed{y=-\dfrac{5}{4}\ \vee\ x=\dfrac{5}{4}}$

7 0

2 years ago

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How do i draw a decimal for example 0.26?

elixir [45]

First, you need convert the decimals into fraction

0.26 = 26/100 = 13/50

The next step would be drawing 50 small boxes on a piece of paper. Make it colorless.

The final stap would be giving 13 out of those 50 boxes with different color (such as black), and you're done

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3 years ago

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Whats the answer? A, B, C, or D?

Firdavs [7]

The answer is the second choice.

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Hope this might help!

:D

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3 years ago

If the equation 3x-5y=-3, what is the value of y when x is 1

pantera1 [17]

The answer is: 6/5

Here is why:
3x - 5y = -3
3(1) - 5y = -3
3 - 5y = -3
3 - 5(6/5) = -3
-3 = -3

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3 years ago

How do I solve 6v-5/8=7/8

astra-53 [7]

6v-5/8=7/8
6v=12/8
v=12/8÷6
v=.25

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2 years ago