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3 years ago

In the above figure, ∠AOB = 80°. What does ∠ACB equal?

Mathematics

1 answer:

Andreas93 [3]3 years ago

5 0

ACB would be half of AOB

80/2 = 40

answer is D 40 degrees

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How long would it take to drive 15 miles at 35 miles per hour?

alekssr [168]

V = velocity
d = distance (or displacement)
t = time
(original equation)
v = d/t
(Given information)
v = 35m/h
d = 15m
(rearrange equation to get)
t = d/v
(substitute numbers in)
t = 15m/35m/h
t = 0.43hours

Therefore, it would take 0.43hours to drive 15 miles at 35 miles per hour

*Hope this helps*

7 0

3 years ago

The number of people who have heard a rumor often grows exponentially. Consider a rumor that starts with 3 people and where the

Marysya12 [62]

Answer:

3.9125 × 10⁵² people

Step-by-step explanation:

A rumor starts with 3 people and the number of people who heard it doubles each day.

How many people would have heard the rumor after 20 days?

To calculate exponential growth, we use the formula:

$y (t) = ae^{kt}$

where;

a = value at the start =3

k = growth rate = 2×3 = 6

t = time = 20 days

y(t) = value of the population at the given time (t) =??

$y(t) = 3 \times e^{6\times 20}$

y(t) = 3.9125 × 10⁵² people

4 0

3 years ago

URGENT!! DESPERATE!! GEOMETRY REFLECTIONS!!! PLEASE INCLUDE EXPLANATION BOGUS ANSWERS WILL BE REPORTED

serious [3.7K]

When we reflect a point across y=x, the x and y coordinates switch out , that is (x,y) becomes (y,x) . SO for point (1,2), on reflection across y=x, (1,2) becomes (2,1) . And when we do reflection across y=-x, (x,y) becomes (-y,-x). Therefore point (2,1) on reflection across y=-x becomes(-1,-2) .

So the final answer is (-1,-2) .

3 0

3 years ago

Find the value of k for which equation k2x2+2kx=4x-6 has no real roots.

hoa [83]

Answer:

Step-by-step explanation:

6 0

3 years ago

2 Points

liraira [26]

Two or zero expresses the possible number of positive real solutions for the given polynomial equation.

Answer: Option D

<u>Step-by-step explanation:</u>

Given equation:

$x^{3}-4 x^{2}-7 x+28=0$

First, we put hit and trial method to find out the one solution. So, if we put x=4 then the above expression will become zero. We can also write the above expression as

$(x-4) \times\left(x^{2}-7\right)=0$

We know the formula, $a^{2}-b^{2}=(a+b)(a-b)$ , make use of this, we get

$(x-4) \times(x-\sqrt{7}) \times(x+\sqrt{7})=0$

So, $x=4, \sqrt{7},-\sqrt{7}$

Hence, from the above expression, we have three values of x as x= 4, 2.64 and -2.64

8 0

3 years ago