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s2008m [1.1K]
2 years ago
5

What are the solutions of this quadratic equation?

Mathematics
1 answer:
Tpy6a [65]2 years ago
4 0

Answer:

r1= -10 r2= +10 (10)

Step-by-step explanation:

r²= 165-65

r²= 100

r=+-(root)100

r1= -10

r2= +10 (10)

You might be interested in
What is “One third of the opposite of a number is less than 12?”
nirvana33 [79]

Answer:

\frac{1}{3}(-x)<12

4 0
3 years ago
What is the area of the trapezoid?<br><br> 80m2<br> 96m2<br> 100m2<br> 120 m2
never [62]

Answer:

100m^2

Step-by-step explanation:

area of trapezoid formula: ({b_{1} +b_{2})}{1/2h}

b=base

so

base #1= 8

base #2= 12

h(height)= 10

(8+12)=20(sum of bases)

20/2=10(sum of bases over 2)

10*10=100(height * whats remaining of bases)

100m^2

hope this helps

5 0
3 years ago
Connected to the question before this
lesya [120]

Answer:

(4)Angle A is 63°

Step-by-step explanation:

To find angle A here is what you have to do

(1) triangle A is an Isosceles triangle which has two of its angles being equal.

(2) To find A we hv to look for the interior angles of the triangle. If u look carefully there is this angle outside the triangle .we can use a property called "Angles on a straight line

(3) " Angles on a straight line sum up to 180°" When u do that ur equation will look like this

126+(x)=180°. u may be wondering hw did we get the x?? well i named the angle we dont know with any valuable like T,F etc .when u group like terms ur equation should look like this (x)=180°-126°

if u subtract ur answer should be x=63°

(B) if u look closely u will see there are two triangles. The one to the far right is an Isosceles triangle why because there is this double stroke indicating it is an Isosceles triangle. Remember an Isosceles triangle has its bases being equal. so the the triangle has two angles of 30°. so If we want to find B we first have to find the interior angles of the Isosceles triangle . so our epuarion will be like this 30°+30°+(X)=180°

U group like terms so it will look like this x=180°-60° so,

x= 120°

So now T=120°

Now to find B

we write the equation like this T+(W)=180°

we put the value of T into the Equation w=180°-120 the answer is 60°

So to find B we find the interior angles of the triangle and the interior angles of the Isosceles triangle sum up to 180. so it will look like this B+90+60=180

Nb they should be in Degrees

finally u group like terms. ur equation should look like this B=180-150

ur answer should be B=30°

7 0
3 years ago
Math Help please show work please due soon uwu :3
Stels [109]

Answer: 416 in^2

Step-by-step explanation:

a. Area of the Triangle x 2 + Area of Rectangle x 3

b. 8 x 7 / 2 x 2 + 8 x 15 x 3 = 56 + 360 = 416 in^2

7 0
2 years ago
the ratio of reds to greens was 5 to 16 and six times the number of reds exceeded the number of greens by 112. how many were red
Masja [62]
Call red as X then X/Green =5/16 => green = 16X/5.
six times the number of reds exceeded the number of green by 112 => 6X-16X/5=112 => 14X/5=112 => X= 40 => reds:40 => green = 128
7 0
3 years ago
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