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aleksandrvk [35]
2 years ago
5

Can someone please explain how to do number 23 I have no idea how to do it.

Mathematics
1 answer:
taurus [48]2 years ago
3 0
Ok so first equate all the three equations whether by substituting or by eliminating then choose the one das not the answer
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Complete The Square:<br> (Z^2)-19z=66
Musya8 [376]
To solve the equation using complete square method we proceed:
z^2-19z=66
but
 c=(-b/2a)^2
c=(-19/2)^2
c=361/4
thus:
z^2-19z+361/4=66+361/4
factoring the LHS we get:
1/4(2z-19)^2=625/4

(2z-19)^2=625
getting the square root of both sides we get:
2z-19=+/-25
2z=+/-25+19
2z=44 or -6
z=22 or -3
Answer: z=22 or z=-3



8 0
3 years ago
Find the ratio of m to n. 9n=3m
Andre45 [30]
3:1



,,,,,,,,,,,,,,hope this helps
3 0
3 years ago
A horse corral is situated on a triangular plot of land. Two sides of the plot are 150 feet long and they meet at an angle of 55
Brrunno [24]

Answer : d. 438.5 ft

The diagram for the given statement is attached below.

Two sides AB and AC are equal so the angle B = angle C

WE know sum of three sides of a triangle = 180

angle A + angle B + angle C = 180

55 + B + C = 180

B + C = 180 -55 = 125

B and C are equal so we divide 125 by 2

angle B = 62.5 and angle C = 62.5

Now we apply sin law

\frac{sin A}{a} = \frac{sin B}{b}

\frac{sin 55}{a} = \frac{sin 62.5}{150}

150 * sin(55) = sin(62.5) * a

122.8728066 = sin(62.5) * a

a = \frac{ 122.8728066}{sin(62.5)}

a= 138.52 feet

To find perimeter we add all the sides

150 + 150 + 138.52 = 438.52 feet



5 0
3 years ago
The city planning committee is composed of 12 women and l4 menWhat fraction of the committee is composed of men?
Mazyrski [523]

to solve you must dive 14 by 12 then simplify to the nearsest tenth.


3 0
3 years ago
Read 2 more answers
Write an equation of a line with the given slope and y-intercept (8,1)m=-1/2
Ganezh [65]
Slope intercept form is y=mx+b 
first plug in m
y=-1/2X + b 
 now plug in the point (8,1) for the x and the y
1=-1/2(8) + b

now you need to solve for b
simplify
1=-4+ b
add 4
5=b

now that you know b
you can plug it into the equation along with the m

so the answer is 
y=-1/2X + 5

5 0
2 years ago
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