All categories

3 years ago

HELPP!! BRAINLIEST??

Mathematics

2 answers:

ICE Princess25 [194]3 years ago

6 0

Answer:

answer number 4 I believe

Agata [3.3K]3 years ago

5 0

Answer:

Its... x > 17

Step-by-step explanation:

1. Since the arrow is pointing to the left of the graph it means <u>greater than.</u>

2. The circle is also not filled in so it does not mean <u>greater than or equal to.</u>

3. The circle is open so that means it is <u>JUST greater than.</u>

Answer: x > 17

You might be interested in

Wilbur paid $7 for a sandwich. He now has $10. With how much money did he start?

kupik [55]

seventeen dollarsStep-by-step explanation:

8 0

3 years ago

Read 2 more answers

A two digit number has 6 more ones than tens. Twice the sum of the number and its reverse is 6 more than ten times the number. F

Alona [7]

The number with the given characteristics is 17

<h3>How to determine the numbers?</h3>

Let the tens be x and the units be y.

So, the number is 10x + y

The relationship between the digits is

y = x + 6

The relationship between the number and the reverse is

2(10x + y + 10y + x) = 6 + 10 * (10x + y)

Simplify the second equation

2(11x + 11y) = 6 + 100x + 10y

Open the brackets

22x + 22y = 6 + 100x + 10y

Substitute y = x + 6

22x + 22(x + 6) = 6 + 100x + 10(x + 6)

Expand

22x + 22x + 132 = 6 + 100x + 10x + 60

Collect like terms

22x + 22x - 100x - 10x = 6 + 60 - 132

Evaluate the like terms

-66x = -66

Divide by -66

x = 1

Substitute x = 1 in y = x + 6

y = 1 + 6

y = 7

Recall that the number is 10x + y

So, we have

Number = 10 * 1 + 7

Evaluate

Number = 17

Hence, the number is 17

Read more about numbers and digits at:

brainly.com/question/12992284

#SPJ1

7 0

2 years ago

Explain why 21i^2 is equivalent to -21

Citrus2011 [14]

Answer:

Step-by-step explanation:

The imaginary number 'i' is equal to the square root of -1. If you were to square the square root, they both cancel and you get -1.

$21i^2=21(\sqrt{-1} )^2=21(-1)=-21$

6 0

3 years ago

If y is proportional to x, find the missing number.

Lady_Fox [76]

Answer:

C. 16

Step-by-step explanation:

5 is half of 10, so 8 should be half of the next number.

5 0

3 years ago

Read 2 more answers

Consider the system of differential equations dxdt=−4ydydt=−4x. Convert this system to a second order differential equation in y

koban [17]

$\dfrac{\mathrm dy}{\mathrm dt}=-4x\implies x=-\dfrac14\dfrac{\mathrm dy}{\mathrm dt}\implies\dfrac{\mathrm dx}{\mathrm dt}=-\dfrac14\dfrac{\mathrm d^2y}{\mathrm dt^2}$

Substituting this into the other ODE gives

$-\dfrac14\dfrac{\mathrm d^2y}{\mathrm dt^2}=-4y\implies y''-16y=0$

Since $x(t)=-\dfrac14y'(t)$ , it follows that $x(0)=-\dfrac14y'(0)=4\implies y'(0)=-16$ . The ODE in $y$ has characteristic equation

$r^2-16=0$

with roots $r=\pm4$ , admitting the characteristic solution

$y_c=C_1e^{4t}+C_2e^{-4t}$

From the initial conditions we get

$y(0)=5\implies 5=C_1+C_2$

$y'(0)=16\implies-16=4C_1-4C_2$

$\implies C_1=\dfrac12,C_2=\dfrac92$

So we have

$\boxed{y(t)=\dfrac12e^{4t}+\dfrac92e^{-4t}}$

Take the derivative and multiply it by -1/4 to get the solution for $x(t)$ :

$-\dfrac14y'(t)=\boxed{x(t)=-\dfrac12e^{4t}+\dfrac92e^{-4t}}$

7 0

4 years ago