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2 years ago

Hi help please thanks!

Mathematics

1 answer:

Scrat [10]2 years ago

7 0

Answer: a

Step-by-step explanation:

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Silva set up a dog-walking buisness. He earned $60 in June. He is projected to earn 110% more in July. How much is Silvia projec

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I think that gain of Silva, in July, is: 60+110100∗60=60+1110∗60=60+66=126$
so A.

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672,591 is closer to 700,000 than

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Sabendo que "K" satisfaz a equação {2(k-8) + 3(-k+1) = -4k +11} Os valores reais de x que satisfazem a equação 15x² - kx + 1 = 0

erastova [34]

Answer:

D) 1/5 e 1/3

Step-by-step explanation:

You have the following quadratic equation:

$15x^2-kx+1=0$ (1)

In order to find the values of x that are solution to the equation (1), you first find the solution for k in the following equation:

$2(k-8)+3(-k+1)=-4k+11\\\\2k-16-3k+3=-4k+11\\\\2k-3k+4k=11+16-3\\\\3k=24\\\\k=8$

Next, you replace the previous value of k in the equation (1) and you use the quadratic formula to find the roots:

$15x^2-8x+1=0\\\\x_{1,2}=\frac{-(-8)\pm \sqrt{(-8)^2-4(15)(1)}}{2(15)}\\\\x_{1,2}=\frac{8\pm 2}{30}\\\\x_1=\frac{1}{5}\\\\x_2=\frac{1}{3}$

Then, the roots of the equation (1) are

D) 1/5 e 1/3

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3 years ago

Complete the point-slope equation of the line through

Grace [21]

<h2>Answer:</h2>

First: info on point-slope form.

Formula: y - y₁ = m(x - x₁)

We need to find the slope of the line first.

$m = \frac{2 + 1}{5 - 1} = \frac{3}{4}$

Slope: $\frac{3}{4}$

Now we can complete the point-slope equation of the line.

$y - (-1) = \frac{3}{4}(x - 1)\\\\y + 1 = \frac{3}{4}(x - 1)$

*These equations are equivalent.

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2 years ago