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3 years ago

AD is altitude of ΔABC and DE is altitude of ΔBEC. If m∠ADB=4x+15, what is m∠EDC?

Mathematics

1 answer:

Anna35 [415]3 years ago

7 0

Answer:

m∠EDC = 4x+15 (vertically opposite angles are equal)

Step-by-step explanation:

Please find the attached document for explanation

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Step-by-step explanation:

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3 years ago

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3 years ago

What vaule of x makes th question true? 3x+2(x-5)=50 a. 8 b.9 c.11 d.12

Ainat [17]

Hey Tierra7l,

Lets solve your equation together step by step.

$3x+2\left(x-5\right)=50$

$\mathrm{Expand}\:2\left(x-5\right):\quad 2x-10$

$\mathrm{Distribute\:parentheses\:using}:\quad \:a\left(b+c\right)=ab+ac$

$a=2,\:b=x,\:c=-5$

$2\cdot \:x+2\left(-5\right)$

$\mathrm{Apply\:minus-plus\:rules}$

$\:\:+\left(-a\right)=-a$

$2x-2\cdot \:5$

$\mathrm{Multiply\:the\:numbers:}\:2\cdot \:5=10$

$2x-10$

$3x+2x-10=50$

$\mathrm{Add\:similar\:elements:}\:3x+2x=5x$

$5x-10=50$

$\mathrm{Add\:}10\mathrm{\:to\:both\:sides}$

$5x-10+10=50+10$

$\mathrm{Simplify}$

$5x=60$

$\mathrm{Divide\:both\:sides\:by\:}5$

$\dfrac{5x}{5}=\dfrac{60}{5}$

$\mathrm{Simplify}$

$x=12$

Hope this helps,

AnthrαX <span> </span>

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3 years ago

Which multiplication problem is equivalent to 338÷34?

gtnhenbr [62]

Answer:

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Step-by-step explanation:

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3 years ago

Multiply the polynomials *<br> –6w(2w2 - 5)

Paul [167]

Answer:

-12w^3 + 30w.

Step-by-step explanation:

–6w(2w^2 - 5) Using the distributive law:

= -6w* 2w^2 - 6w*-5

= -12w^3 + 30w.

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4 years ago