Please help. No link answers. Will mark brainliest.

Answer:

x = 45

Step-by-step explanation:

Brainliest Please!

Answer:

Answer in explanation

Step-by-step explanation:

The graph of f does not cross the x-axis. We know this because for any value x, we always get that x^2+4 is positive. x^2 is positive or zero ( 0 or greater than 0) for any x but adding 4 to it makes It 4 or greater than 4.

The discriminant is negative.

That is, b^2-4ac is negative.

Upon comparing ax^2+bx+c to x^2+4 we see that a=1, b=0, and c=4..

Plugging those into b^2-4ac gives

(0)^2-4(1)(4)

=0-16

=-16.

Negative discriminant implies two nonreal zeros so it will not cross the x-axis.

(Positive discriminant implies 2 real and zero discriminant imples 1 real.)

f(x)=-5x2+4x-6

f(2)= -5*2*2+4*2-6

f(2)= -20+2

f(2)=-18

Answer: 0.56

Step-by-step explanation:

The spool holds a total of 36 inches of ribbon and out tis amount, Celeste used 20 inches of ribbon.

Celeste therefore used 20 / 36 of the ribbon available from the stool.

In decimal this is:

= 20 ÷ 36

= 0.5556

= 0.56

Answer:

$9

Step-by-step explanation:

Answer:

$9

Step-by-step explanation:

between 2 and 4 is 3 sandwiches.

There is a point at 3 and 9

(3,9) $9 for 3 sandwiches

Answer:

Every 1.71 seconds, the bacteria loses [tex]\frac{1}{2}[/tex]

Step-by-step explanation:

Given

[tex]B(t) = 8500 * (\frac{8}{27})^\frac{t}{3}\\[/tex]

Required [Missing from the question]

Every __ seconds, the bacteria loses [tex]\frac{1}{2}[/tex]

First, we model the function from t/3 to t.

[tex]B(t) = 8500 * (\frac{8}{27})^\frac{t}{3}\\[/tex]

Apply law of indices

[tex]B(t) = 8500 * (\frac{8^\frac{1}{3}}{27^\frac{1}{3}})^t[/tex]

Evaluate each exponent

[tex]B(t) = 8500 * (\frac{2}{3})^t[/tex] --- This gives the number of bacteria at time t

At time 0, we have:

[tex]B(0) = 8500 * (\frac{2}{3})^0[/tex]

[tex]B(0) = 8500 * 1[/tex]

[tex]B(0) = 8500[/tex]

Let r be the time 1/2 disappears.

When 1/2 disappears, we have:

[tex]B(r) = \frac{B(0)}{2}[/tex]

[tex]B(r) = \frac{8500}{2}[/tex]

[tex]B(r) = 4250[/tex]

So, we have:

[tex]B(t) = 8500 * (\frac{2}{3})^t[/tex]

Substitute r for t

[tex]B(r) = 8500 * (\frac{2}{3})^r[/tex]

Substitute [tex]B(r) = 4250[/tex]

[tex]4250 = 8500 * (\frac{2}{3})^r[/tex]

Divide both sides by 8500

[tex]\frac{4250}{8500} = (\frac{2}{3})^r[/tex]

[tex]\frac{1}{2} = (\frac{2}{3})^r[/tex]

Take log of both sides

[tex]log(\frac{1}{2}) = log (\frac{2}{3})^r[/tex]

Apply law of logarithm

[tex]log(\frac{1}{2}) = r\ log (\frac{2}{3})[/tex]

Make r the subject

[tex]r = log(\frac{1}{2}) / log (\frac{2}{3})[/tex]

[tex]r = \frac{-0.3010}{-0.1761}[/tex]

[tex]r = 1.71[/tex]

Hence, it reduces by 1/2 after every 1.71 seconds

Answer:

Every second, the number of bacteria is multiplied by a factor of 0.67

Step-by-step explanation:

Let's rewrite the base so that the exponent is just t.

(8/27)^t/3=((8/27)^1/3)t=(2/3)^t

Therefore, we can rewrite the modeling function as follows.

B(t)=8500⋅(2/3)t

According to this model, the number of bacteria is multiplied by 2/3 every second. Rounding this to two decimal places, we get 2/3 ≈0.67

Answer:

Green) 24in

Yellow) 31in

Blue) 27in

Step-by-step explanation:

Just add each number of the one shape.

To find the Area:

Multiply each number

To find Perimeter:

Add each number

Answer:

1. 24  2. 20  3. 1.75(I think)  4. 11

Step-by-step explanation:

3 might be incorrect but The others seem more correct than ever :)

Answer:

             [tex]x=4\\\\EG=9\\\\ED=18[/tex]

Step-by-step explanation:

[tex]\dfrac{x+5+9}{x+5}=\dfrac{12}{6}\\\\\dfrac{x+14}{x+5}=2\\\\x+14=2(x+5)\\\\x+14=2x+10\\\\14-10=2x-x\\\\x=4\\\\EG=4+5=9\\\\ED=9+9=18[/tex]

Answer:

h = 1 1/3

Step-by-step explanation:

So when we divide base x height by two we get

Lets multiply 8 x 2

16

So now lets divide by 3

16 / 3 = 1 1/3

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Answer:

Yes, they are necessary because it tells you where you need ti start 1st in the equation you are trying to solve.

you can also go by the PEMDAS

Parenthesis

Exponents

Multiply

Divide

Add

Subtract.

that is how i learned it.

Hope this helps

Answer:

(1+1+1)!*1=6

Step-by-step explanation:

Answer:

45 min = 0.75 hours

Step-by-step explanation:

Since Boat A is 6 miles ahead of boat B and has a top speed of 36 miles per hour, the distance it moves in time, t is d = 6 + 36t where 36t is the distance it moves in time, t with speed 36 miles per hour.(36t = 36 miles per hour × t hours)

Also, since Boat B has a top speed of 44 miles per hour, the distance d' it moves in time, t with this speed is

d'= 44t (44t = 44 miles per hour × t hours)

When Boat B catches up with Boat A, their distances are equal. So,

d = d'

6 + 36t = 44t

subtracting 36t from both sides, we have

44t - 36t = 6

simplifying

8t = 6

dividing through by 8, we have

t = 6/8 hours

t = 0.75 hours

t = 0.75 × 60 min

t = 45 min

Answer: all the ones that do not have a negative sign in front easy.

Answer:

Step-by-step explanation:

Answer:

pretty sure its the second one

Step-by-step explanation:

Answer:

Step-by-step explanation:

A penny is worth 1 cent. = 0.01p

A nickel is worth 5 cents = 0.05n

Let the number of pennies = x

Number of nickels = y

A bag of coins contains pennies and nickels. There are 40 coins in all. The total value of the coins is $0.72. How many coins are pennies, and how many are nickels? Write 2 equations.

Answer:

41-37=4

Answer: 4

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Answer:

10 MILES

20 MINUTES

20 MILES

30MINUTES

Answer:

a)30 mph

b.)40 mph

c.)36mph

Step-by-step explanation:

Answer:

1) yes, all of their angles are equal.  (75°, 45°, and 60°)

2) No, their angles are not equal. (42°, 48°, 90°  vs  58°, 32°, 90°)

Step-by-step explanation:

1.

ΔWXY and ΔRST are similar because they have equal angles.

2.

ΔJKM and ΔKLM are not similar because the angles are not equal.

A triangle is a 2-D figure with three sides and three angles.

The sum of the angles is 180 degrees.

We can have an obtuse triangle, an acute triangle, or a right triangle.

We have,

1.

In ΔWXY,

∠X = 75

∠Y = 60

∠W = 180 - (75 + 60) = 180 - 135 = 45

In ΔRST,

∠S = 45

∠R = 60

∠T = 180 - (45 + 60) = 180 - 105 = 75

Now,

We can say that,

ΔWXY and ΔRST are similar because they have equal angles.

2.

In ΔJKM,

∠J = 42

∠M = 45

∠K = 180 - (42 + 45) = 180 - 87 = 93

In ΔKLM,

∠K = 58

∠M = 90

∠L = 180 - (58 + 90) = 180 - 148 = 132

ΔJKM and ΔKLM are not similar because the angles are not equal.

Thus,

ΔWXY and ΔRST are similar because they have equal angles.

ΔJKM and ΔKLM are not similar because the angles are not equal.

Learn more about triangles here:

https://brainly.com/question/25950519

#SPJ2

Answer:

No, it is not possible

Step-by-step explanation:

Required

Is it possible to have a line segment with: [tex]m = \infty[/tex]

To answer this question, we will interpret the steepness as slope.

So, we have:

[tex]m = \infty[/tex]

The interpretation of a line with: [tex]m = \infty[/tex] is:

It starts from (x,y_1) and ends at (x,y_2)

When the slope (m) is then calculated, we have:

[tex]m = \frac{y_2 - y_1}{x_1 - x_1}[/tex]

[tex]m = \frac{y_2 - y_1}{0}[/tex]

[tex]m = \infty[/tex]

What this means is that, the line has no end points.

A line segment as described here means a line that has endpoints (i.e. a finite starting point and a finite finish point)

So, we've established that: [tex]m = \infty[/tex] means no endpoints and a line segment has end points, then we can conclude that it is not possible to create a line segment with [tex]m = \infty[/tex]

Steepness of a  line is the rise or fall of it at a sharp angle.The Is it not possible to create a line segment with infinite steepness, as the slope of the such line will be infinite whether a line is plotted with finite points.

Steepness of a  line is the rise or fall of it at a sharp angle. The slope of the line describe the steepness of a line.

A infinite steepness refers to a vertical line on the graph. When the line with infinite steepness plotted on the graph it is only parallel to the y axis. The change on the x axis is zero and does not move in the x axis, when a line has infinite steepness.

To understand it better suppose a line is passed through the point [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] points. For such line the slope of the line can be given as,

[tex]m=\dfrac{y_2-y_1}{x_2-x_1} [/tex]

The line with infinite steepness does not move in the x axis. The coordinate of the x axis same for the line. Thus,

[tex]x_2=x_1[/tex]

The slope for such line is,

[tex]m=\dfrac{y_2-y_1}{x_1-x_1} [/tex]

[tex]m=\dfrac{y_2-y_1}{0} [/tex]

[tex]m=\infty[/tex]

Thus the slope of the line is infinite. But the line With no finite point is not possible to plot.

Hence the Is it not possible to create a line segment with "infinite steepness, as the slope of the such line will be infinite whether a line is plotted with finite points.

Learn more about the steepness of the line here;

https://brainly.com/question/806542

Answer:

.

Step-by-step explanation:

Answer:

To make the parabola go through the point (-4, 0), it must have a y-intercept of 80. Hope this helps!

Answer:

72%

Step-by-step explanation:

A smart freind of mi e says this is the answer

Answer:

Its false 24>6+9

Step-by-step explanation:

6+9=15

Answer:

C

Step-by-step explanation:

Answer:

V = 65.97π

Step-by-step explanation:

Answer:

g00gle is a really great source for these questions!

Just put in the information and they do they work!

Step-by-step explanation:

66 inches cubed since you round up .03 decimals!

or 65.97 if you aren't supposed to round