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2 years ago

Helpppppppp please i dont understand

Mathematics

2 answers:

RUDIKE [14]2 years ago

8 0

Answer:

(a) 64 days

(b) 2 phones calls

Step-by-step explanation:

Elden [556K]2 years ago

7 0

First blank is 64 (16/8=2 128/64=2)
Second blank is 2 (8/8=1 16/8=2)

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Step-by-step explanation:

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3 years ago

A small box measures 6 in. by 4 in. by 3 4 3 4 in. high. Find the volume of the box.

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3 years ago

A girl is exactly one yard tall and her sister is 1/3 of a yard taller. how many total inches tall are they added together.

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3 years ago

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Two dice are tossed 288 times. How many times would you expect to get a sum of 5?

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2 years ago

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Find the coordinates of the circumcenter of △PQR with vertices P(−2,5), Q(4,1), and R(−2,−3).

mel-nik [20]

Answer: (1/3,2)

Step-by-step explanation:

Let O(x,y) be the circumference of the triangle PQR,

Thus, by the property of circumcenter all the vertices of the triangle are at same distance from this circumcenter.

Thus, PO = QO

By the distance formula,

$(x+2)^2+(y-5)^2 = (x-4)^2+(y-1)^2$

$\impliesx^2+ 4x + 4 + y^2+ 25 - 10 y = x^2+16 - 8 x + y^2+1 - 2y$

$\implies 4x + 4 + 25 - 10 y = 16 - 8 x + 1 - 2y$

$\implies 4x +8x-10y+2y = 16 + 1 -25-4$

$\implies 12x - 8y = 17 - 29$

$\implies 12 x - 8 y = - 12$ ---------(1)

Similarly, QO = RO

$\implies (x-4)^2 + (y-1)^2 = (x+2)^2+(y+3)^2$

$\implies x^2 + 16 - 8x + y^2+ 1 - 2y = x^2+ 4 + 4 x +y^2+ 9 + 6 y$

$\implies 16 - 8x + 1 - 2y = 4 + 4 x + 9 + 6 y$

$\implies - 8x -4x-2y-6y=4+9-16-1$

$\implies -12 x - 8 y = 13 - 17$

$\implies 12 x + 8 y = 4$ ------------(2)

By adding equation (1) and (2),

24 x = - 8

x = 1/3

By putting this value in equation (1),

We get,

Thus, 4 - 8 y = -12

8 y = 16

y = 2

7 0

2 years ago

Helpppppppp please i dont understand ​

Helpppppppp please i dont understand