2 years ago

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Mathematics

1 answer:

DIA [1.3K]2 years ago

8 0

Answer: the answer is c.

Step-by-step explanation:

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When k=7 and q=35 find the value of p in direct proportion method

Arisa [49]

I think the answer is 5.

y = kx is the equation for direct proportionality. I’m guessing your “q” is the “y”, because 35 is easily divisible by 7.

35 = 7x
x = 5

7 0

3 years ago

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

5 0

4 years ago

F(x)=x^2-x^3 <br> what's the value of f(-2)

Anvisha [2.4K]

(-2)^2-(-2)^3

=4-(-8)

=4+8

=12

4 0

3 years ago

Read 2 more answers

♡

earnstyle [38]

Answer:

it is 69.5

Step-by-step explanation:

8 0

3 years ago

The sum of two numbers= 9, the sum of two times the larger number and the smaller one is 15. Find the two numbers.

Aliun [14]

The two numbers are 6 and 3

6+3=9

6(2)+3=15

6 0

3 years ago