What is four plus eight

Answer:

21

Step-by-step explanation:

7-(-14) = 7+14 = 21

Answer:

21

Step-by-step explanation:

7-(-14)

7+14 = 21

because two minuses makes a plus

GIVE ME BRAINLIEST NOW PLEASE!

Answer:

42.5 cm²

Step-by-step explanation:

1/2x17x5 = 42.5

9x8

Step-by-step explanation: the 8 is the to the power btw

Answer:

C

Step-by-step explanation:

The number of people who have heard a rumor is modeled by the logistic function:

[tex]\displaystyle f(x)=\frac{260}{1+23e^{-0.06x}}[/tex]

And we want how many days has passed since the rate at which the rumor spread began to decrease.

First, the numerator tells us that the total number of people who will have heard the rumor by the end is 260.

Recall that the point of maximum growth is always half of the maximum capacity.

In this case, that point will be 260/2 = 130.

For a logistic function, the rate of all values to the left of the halfway point is increasing, (i.e. concave up), while the rate of all values to the right is decreasing (i.e. concave down). Therefore, we can solve for x when f(x) = 130:

[tex]\displaystyle 130=\frac{260}{1+23e^{-0.06x}}[/tex]

Cross-multiply:

[tex]130(1+23e^{-0.06x}})=260[/tex]

Distribute:

[tex]130+2990e^{-0.06x}=260[/tex]

Solving for x:

[tex]2990e^{-0.06x}=130[/tex]

Therefore:

[tex]\displaystyle e^{-0.06x}=\frac{130}{2990}=\frac{1}{23}[/tex]

Taking the natural log of both sides:

[tex]\displaystyle -0.06x=\ln\Big(\frac{1}{23}\Big)[/tex]

Therefore:

[tex]\displaystyle x=\frac{\ln(1/23)}{-0.06}\approx52.3[/tex]

After about 52.3 days, the rate at which the rumor started spreading will begin to decrease.

Answer:

36.8 ft^2

Step-by-step explanation:

The surface is consisted of 2 triangles and 3 rectangles. The two triangles are the same the Area together = 2.2*1.5 = 3.3 ft^2, then the 3 rectangles are 2.2 X 5, 1.5 X 5 and 3 X 5, so to add them together to get the surface area so SA = 3.3 + 2.2*5 + 1.5*5 + 3 *5 = 36.8 ft^2.

If it is helpful, plz give me Brainliest.

Answer: Answers and work are all in the picture that I attached. Hope this helps

Answer:

you would save 4$

Step-by-step explanation:

Answer:

should be 3.07 (when rounded to the nearest  hundredth)

Step-by-step explanation:

Answer: $3.08 per pound of strawberries.

Unit price is 3.08/1

Step-by-step explanation: The unit price is how much 1 point of strawberries cost.

To find the unit price divide 20 by 6.5.

20/6.5 = about $3.08.

Answer:

1 and 1/3

Step-by-step explanation:

2 * 2 = 4, 4/3 is 1 and 1 /3

Answer:

4/9

Step-by-step explanation:

1-9/16 :) good luck my friend

Answer:

5 grams for each nickle

Step-by-step explanation:

Brainleiest plz.

I divided 45 and 9 and got 5

Answer: 1.2 or 5 (there’s two solutions)

Step-by-step explanation:)

Answer:

Step-by-step explanation:

The volume of the prism:

If each of the dimensions is doubled, then the volume becomes:

The larger prism has 8 times greater volume

Answer:

10

Step-by-step explanation:

or was it 11??

Dude it is A!!!!!!!!!!!!!!!!!!

Answer:

Step-by-step explanation:

Yes it's a function.

You may be looking at v which produces m

You may be looking at r which also produces m.

That's fine. Two different x values (the domain) can produce the same y value. Lots of functions do that. (you'll study parabolas pretty soon and all that open up or down have two x values producing the same y value).

If you have a member of the domain producing 2 y values,  that doesn't work. That would not be a function.

This example is a function.

Answer: f = 100

Step 1.

We'll need to expand 3(f - 91) by multiplying a term and an expression. The following product distributive property will be used: A(B + C) = AB + AC.

In the example, the expression will consist of 2 terms.

First term: 3 and f.

Second term: 3 and -91

Rewrite 3(f - 91) like this.

3f - 3 × 91

Step 2.

Multiply 3 by 91.

3 × 91 = 273

Hence, the answer is 100.

Answer:

C (H. x=3)

Step-by-step explanation:

It wants a line where both sides are equal. Since the parabola is opening upward, it has to be an x= equation. That rules out F and J. Next you count out the points to the vertex on the x axis, which seems to be 3. This means that the line is x=3, or H(c)

Answer:

$200.75

Step-by-step explanation:

Brainliest please

Answer:

$28

Step-by-step explanation:

1/5 of $70 is 14 . so $70 - $14 is $56

1/2 of $56 is $28

Hope this helps x

Hope it helps you....

Sorry if it's wrong..

Answer:

x > 5

Step-by-step explanation:

Answer:

we have -3x < -15,

so

3x > 15,

x > 5

brainliest please?

Answer:

y = -2x

Step-by-step explanation:

Equation in slope-intercept form is y = mx + b.

m = slope = ∆y/∆x

Using any two points on the line, say (0, 0) and (-20, 40),

Slope (m) = (40 - 0) / (-20 - 0) = 40/-20

Slope (m) = -2

b = y-intercept = the value of y when x = 0.

b = 0

To write the equation of the line, substitute m = -2 and b = 0 into y = mx + b

Thus:

y = -2x + 0

y = -2x

Answer:

C i think

Step-by-step explanation:

pls mark brainlyest

Answer:

13.5 cm

Step-by-step explanation:

The altitude of the base of the isosceles triangle bisects the vertex angle, <T, and also bisects the base, NS.

Therefore, NS is divide into two, 15 cm each.

This means we now have two right triangles from the isosceles triangle with the following:

Reference angle = 42°

Opposite = altitude = h

Adjacent = 15 cm

To find h, apply trigonometric function, TOA:

Tan 42 = Opp/Adj

Tan 42 = h/15

15 * Tan 42 = h

h = 13.5060607 ≈ 13.5 cm (nearest tenth)

Answer: 2.1

Step-by-step explanation:

Answer: B and D

Step-by-step explanation: 8.3 · cos (90° -75°) , and i cant remember what D was sorry

Khan Academy

Answer:

the top one!

Step-by-step explanation:

Answer:

2 =6

3= 9

4=12

5=15

Step-by-step explanation:

Formula is 3x

2 x 3= 6

3 x 3=9

4 x 3= 12

15/3= 5