3 years ago

Multiply: (2x+3)(4x+5) Simplify and write your answer in Standard Form.

Mathematics

1 answer:

irga5000 [103]3 years ago

8 0

Answer:

the answer is 8x^2+22x+15.

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4x^2 = 92 + 7x solve the equation using the guadratic formula, show all work

katovenus [111]

$4x^2=92+7x\ \ \ \ |-4x^2\\\\-4x^2+7x+92=0\\\\a=-4;\ b=7;\ c=92\\\\b^2-4ac=7^2-4\cdot(-4)\cdot92=49+1472=1521\\\\\sqrt{b^2-4ac}=\sqrt{1521}=39\\\\x_1=\dfrac{-b-\sqrt{b^2-4ac}}{2a};\ x_2=\dfrac{-b+\sqrt{b^2-4ac}}{2a}\\\\x_1=\dfrac{-7-39}{2\cdot(-4)}=\dfrac{-46}{-8}=\dfrac{23}{4}\\\\x_2=\dfrac{-7+39}{2\cdot(-4)}=\dfrac{32}{-8}=-4$

$\text{Answer:}\ A.\ \left\{\dfrac{23}{4};\ -4\right\}$

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4 years ago

In ΔXYZ, the measure of ∠Z=90°, ZY = 4, XZ = 3, and YX = 5. What ratio represents the tangent of ∠X?

nordsb [41]

Answer: 4/3

Step-by-step explanation:

you're finding the tangent of X which is at the top so you do opposite over adjacent

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3 years ago

How many real number solutions exist for 2x2 + 8x + 8 = 0?

klasskru [66]

Hello,

There is one solution with multiplicity 2.
$2x^2+8x+8=0\\
2(x^2+4x+4)=0\\
2(x+2)^2=0\\
Sol=\{ {-2}\}$