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2 years ago

10

(a) Draw in radii OA, OB, OC and OD. Then, explain why OAB must

1 answer:

lions [1.4K]2 years ago

7 0

Answer:

In the given circle, segments OA, OB, OC and OD are radius of the circle.

In other words, all those segments are congruent.

From that we can deduct that triangles OAB and OCD are isosceles triangles, because all segments are equal. That makes those triangles congruent, because they have the same sides.

From the congruence we can deduct that all corresponding internal angles inside those triangles are actually congruent, that's why angle OAB and ODC must be congruent.

Also, angles DOC and BOA are also congruent, which means their subtended arcs are also congruent, because they have the same radius, so mAB = mCD.

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nalin [4]

Answer:

a) -2t²+12t+15 b) 25, 31 c) 26

Step-by-step explanation:

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dN/dt= -2t2+12t+15

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dN/dt= -2(1)²+12(1)+15

dN/dt=25

At 10 am, it will 2 hrs since the start of morining shift be so t=2

dN/dt=-2(2)²+12(2)+15

DN/dt= 31

c) N(2)-N(1)= (-(2)³+6(2)²+15(2))-(-(1)³+6(1)²+15(1))

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2 years ago

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stira [4]

Answer:

311 students prefer sushi

Step-by-step explanation:

Let

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y -----> the number of students who prefer sushi

we know that

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2 years ago

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yanalaym [24]

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2 years ago

Multiple 7/9 to the sum of 8 3/7 and 5 11/14

Brums [2.3K]

$\frac{7}{9} \times (8 \frac{3}{7} + 5 \frac{11}{14}) = \\$

$\frac{7}{9} \times (8 \frac{6}{14} + 5 \frac{11}{14} ) = \\$

$\frac{7}{9} \times (13 \frac{6 + 11}{14}) = \\$

$\frac{7}{9} \times (13 \frac{17}{14}) = \\$

$\frac{7}{9} \times (14 \frac{3}{14}) = \\$

$\frac{7}{9} \times ( \frac{14 \times 3 + 3}{14}) = \\$

$\frac{7}{9} \times ( \frac{42 + 3}{14}) = \\$

$\frac{7}{9} \times ( \frac{45}{14}) = \frac{7 \times 45}{9 \times 14} = \frac{5}{2} \\$

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And we're done.

Thanks for watching buddy good luck.

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2 years ago

Read 2 more answers

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Ket [755]

The equation used for this is

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2 years ago