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madam [21]
3 years ago
7

Which of the following equations can be used to find the length of EF in the triangle below?

Mathematics
1 answer:
lbvjy [14]3 years ago
5 0

Answer:

first choice is the correct answer

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P and Q are two points on the line x - y + 1 = 0 and are at distance 5 from the origin. Find the area of the triangle OPQ. ​
Alecsey [184]

Answer:

P and Q are two points on the line x-y+1=0 and are at a distant of 5 units from the origin. Find the area of triangle POQ.

Step-by-step explanation:

P and Q are the intersection points of

x-y+1 = 0 and the circle x^2 + y^2 = 25

sub y = x+1 into the circle

x^2 + (x+1)^2 = 25

x^2 + x^2 + 2x + 1 - 25 = 0

x^2 + x - 12 = 0

(x+4)(x-3) = 0

x = 3 or x = -4

y = 4 or y = -3

so P(3,4) and Q(-4,3) are our two points

Height of triangle.

h = |0 - 0 + 1|/√2 = 1/√2

PQ = √( (-7)^2 + 1^2) = √50 = 5√2

area POQ = (1/2)(1/√2)(5√2) = 5/2 square units

hope this helped

7 0
2 years ago
3. Which property justifies rewriting
Maksim231197 [3]
B distributive property
7 0
3 years ago
Please help need done today
joja [24]

Answer:

area of the BCD triangle=1/2×10×9

=45

area of the ABD triangle=1/2×10×3

=15

Total area=45+15

=60 square centimetres

7 0
3 years ago
Anyone know the answer to this geometry question?
xxMikexx [17]

Answer:

The answer would be $45

hope this helps:)



8 0
3 years ago
Find x. 895852 = -70x + 789/9(3^3 × 6) - 30
snow_lady [41]

Answer:

x=  88168/7

Hope it helps!

 

7 0
2 years ago
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