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3 years ago

What is the Vertex? y = x² - 8x-1

Mathematics

2 answers:

OleMash [197]3 years ago

8 0

Answer:

The vertex is (4,-17)

Step-by-step explanation:

ruslelena [56]3 years ago

4 0

Vertex is (4,-17) hope this helps!

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a car travels 1.2 miles from point a to point b. the car then turns at point b and travels 1.8 miles to point c before heading b

wel

Since we are given with the three sides of the triangle and asked to determine the angle, we can use the cosine law.

b² = a² + c² - 2ac(cosB)

Substituting the known values,

(1.8)² = (2.4)² + (1.6)² - 2(2.4)(1.6)(cosB)

The value of B from the equation is 48.6°.

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3 years ago

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kkurt [141]

Your answer would be D

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2 years ago

A police officer investigating an accident finds a skid mark of 115 ft in length. How fast was the car going when the driver app

Dominik [7]

The question doesn't provide enough information to get an accurate answer. Please provide more information or provide acceptable assumptions.

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3 years ago

Scientists have discovered a vaccine for a debilitating disease. This year there were 570,000 reported new cases of the disease

Ket [755]

Answer: There are approximately 853827 new cases in 6 years.

Step-by-step explanation:

Since we have given that

Initial population = 570000

Rate at which population decreases is given by

$\frac{2}{3}$

Now,

First year =570000

Second year is given by

$570000\times (\frac{1}{3})$

Third year is given by

$570000(\frac{1}{3})^2$

so, there is common ratio ,

it becomes geometric progression, as there is exponential decline.

so,

$570000,570000\times \frac{1}{3},570000\times( \frac{1}{3})^2,......,570000\times (\frac{1}{3})^6$

a=570000

common ratio is given by

$r=\frac{a_2}{a_1}=\frac{1}{3}$

number of terms = 6

Sum of terms will be given by

$S_n=\frac{a(1-r^n)}{(1-r)}$

We'll put this value in this formula,

$S_6=\frac{570000(1-(\frac{1}{3})^6}{(1-\frac{1}{3})}\\\\=853827.16$

So, there are approximately 853827 new cases in 6 years.

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2 years ago

Which do you think will have a greater value, 1/8 of one pound gold or 1/4 of lead? Why?

Ivenika [448]

if you multiply 1/8 by 4, the fraction become 4/32, and if you multiply 1/4 by 8 you get 8/32.Since both fractions have the same denominator, we can find which fraction has the greater value. Since 1/4(8/32) has a greater numerator, the 1 pound of lead will have a larger value.

4 0

3 years ago