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kari74 [83]
3 years ago
6

Need the answer ASAP!! 20 points

Mathematics
1 answer:
aniked [119]3 years ago
8 0

Answer:

I think C. is it

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
3 years ago
Read 2 more answers
Find the x-intercept and y-intercept of the line.
IceJOKER [234]

Answer:

Use the slope-intercept form y=mx+by=mx+b to find the slope mm and y-intercept bb.Slope: 22y-intercept: (0,2)(0,2)

Step-by-step explanation:

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PLEASE HELP!! 25 POINTS!! WILL MARK BRAINLIEST!!
Strike441 [17]

Answer:The equation of the parabola is y=18(x−2)2−3

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Find m angle C<br> 62 degrees<br> 70 degrees
wlad13 [49]

Answer:

48°

Step-by-step explanation:

..,.............,...........

CDB = ABD( given)

CBD= ADB( given)

Now,

CBD+CDB+C = 180°

70°+62°+ C = 180°

C= 180°-132°

C= 48°

7 0
3 years ago
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A CD usually sells for $13.00. If the CD is 30% off, and sales tax is 8%, what is the total price of the CD, including tax?
slamgirl [31]

I think it's $10.14.

8 0
3 years ago
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