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2 years ago

Will mark brainliest if I can.

Mathematics

1 answer:

OLEGan [10]2 years ago

5 0

Answer:

(0, -4)

(2,0)

Step-by-step explanation:

Basically x intercept is (0, -4)

Y intercept is (2, 0)

Hope I helped!

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Geometry - Triangle d) In the given figure, BE = EC and CE is the bisector of ZACB. Prove that ZBEC = ZACD. E B D С

Llana [10]

Answer:

Let m∠BCE = x

Then m∠ACE = x as well since CE is bisecting ∠ACB.

m∠ACD + x + x = 180° ⇒
m∠ACD = 180° - 2x

Consider ΔBEC

Since BE = EC, the opposite angles are congruent:

∠BCE ≅ ∠CBE

Then:

m∠CBE = m∠BCE = x

Find the angle BEC:

m∠BEC = 180° - (x + x) = 180° - 2x

Comparing the above we see that:

m∠BEC = m∠ACD
proved

8 0

2 years ago

Explanation 5 + 5 Answer 10

svetlana [45]

Answer:

5 + 5 = 10

5 + 6 = 11

5 + 7 = 12

5 + 8 = 13

5 + 9 = 14

5 + 10 = 15

5 + 11 = 16

Step-by-step explanation:

7 0

1 year ago

The Highway Safety Department wants to study the driving habits of individuals. A sample of 40 cars traveling on a particular st

Ipatiy [6.2K]

Answer:

We need a sample size of at least 101

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

What sample size is needed to estimate the true average speed to within 2 mph at 99% confidence?

We need a sample of at least n.

n is found when M = 2. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$2 = 2.575*\frac{7.8}{\sqrt{n}}$

$2\sqrt{n} = 2.575*7.8$

$\sqrt{n} = \frac{2.575*7.8}{2}$

$(\sqrt{n})^{2} = (\frac{2.575*7.8}{2})^{2}$

$n = 100.85$

Rounding up

We need a sample size of at least 101

8 0

2 years ago

Read 2 more answers

James trained for the Boston marathon for 3 1/2 hours every day how many hours did he train in the month of June?

n200080 [17]

If you say 3.5 times 30 ur answer would be 105

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2 years ago

Plsssss help!!!!! I’m rewarded a lot of points.

tensa zangetsu [6.8K]

This is all the picture showed omg toooo hard

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2 years ago