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3 years ago

Number 4. Isosceles triangle ABC has vertices at A(0,0), B(8,0), and C(x,12)

Mathematics

1 answer:

Galina-37 [17]3 years ago

3 0

The awnser to the question is a

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I Need Help With This Question

babymother [125]

Answer:

87°

Step-by-step explanation:

it can be seen directly

if you want angle AOD

it's 78°

8 0

3 years ago

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What is the solution set of the following equation? 6x^2 = 13x + 5

fiasKO [112]

Answer:

2nd

Step-by-step explanation:

using the quadric formula

$- ( - 13) + - \sqrt{( - 3) {}^{2} - 4 \times 6( - 5) } \div 2 \times 6$

do the math and you get the second one.

{-1/3,5/2}

6 0

3 years ago

60 POINTS PLEASE HELP FAST!!!! write the equation of a line in standard form that passes through the points (-4,-1) and (1.5,2)

liraira [26]

You find your slope with the equation

(y2-y1)/(x2-x1)

(-1-2)/ -4-1.5)

(-3)/(-5.5)

.54x is your slope

you then plug that into your equation.

y=mx+b

y=.54x+b

you substitute one of our coordinates.

(-4,-1)

-1=.54(-4)+b

-1=-3.45+b

+3.45

2.45=b

your equation is

y=.54x+2.45

standard form

y-.54x=2.45

5 0

3 years ago

Solve for x use the completing the square method x^2+6x=5

Mrac [35]

Answer:

$x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}$

Step-by-step explanation:

$x^{2}$ +6x-5=0

we divide the coefficient of the X by half :

in this case: 6/2 = 3 , then we do the following

The result obtained is raised to square power: 3^2=9

we sum and subtract by 9 to maintain the balance of the equation:

$x^{2}$ +6x+9-9-5=0

we have:

$(x+3)^{2}$ -9-5=0

$(x+3)^{2}$ = 14

lets apply square root on both sides of the equation:

$\sqrt{(x+3)^{2}}=\sqrt{14}$

we know:

$\sqrt{a^{2}} = abs(a)$

so we have:

abs(x+3)= $\sqrt{14}$

from where two solutions are obtained

$x_{1} + 3 =\sqrt{14} \\\\x_{2} + 3 =-\sqrt{14}$

finally we have:

$x_{1} =-3 +\sqrt{14} \\\\x_{2} =-3 -\sqrt{14}$

5 0

3 years ago

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A shirt has an original price of $19.75. If the shirt is marked 25% off and there is a 7.75% tax, how

Bumek [7]

Answer: 4.90 im not 100 percent sure

Step-by-step explanation:

To find the actual discount, multiply the discount rate by the original amount 'x'. To find the sale price, subtract the actual discount from the original amount 'x' and equate this to given sale price.

4 0

3 years ago

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