pLEASE help best and right answer gets brainliest

Answer:

the reasoning states that "all the numbers begin with a 7 or an 8"

however this is not accurate as they can be in different placements

which can make a big difference in the total estimate.

for example:

the number could've been an 8, or an 80

they both begin with an 8

however have totally different values and could have messed up the total estimated number.

hope this helps :D

9514 1404 393

Answer:

  b²/c tunnels

Step-by-step explanation:

The number of tunnels per ant-hour is ...

  b/(ac)

Multiplying that by the new number of ant-hours, we have ...

  (b/(ac))(ab) = b²/c . . . . tunnels

Answer:

C

Step-by-step explanation:

f(x) = √x - 5

domain: [0. ∞)

range: [-5, ∞)

Let y = √x - 5

√x = y+5

x = (y+5)²

Switch x and y:

y = (x+5)²

f⁻¹(x) = (x+5)²

domain of f⁻¹(x) is the range of f(x):  [-5,∞)

Answer:

d = 8

Step-by-step explanation:

(d-5)/ -3 = -1

Multiply each side by -3

(d-5)/ -3 *-3 = -1*-3

d-5 = 3

Add 5 to each side

d-5+5 = 3+5

d = 8

Answer:

B

Step-by-step explanation:

The inequality will be 35000-320m>0

Answer:

43-28= 15 extra hours

normal hourly rate = a

extra hourly rate = 1.1a

28a + 15(1.1a) = 631.90

28a + 16.5a = 631.90

Answer:

9

Step-by-step explanation:

if that v is root symbol

Answer:

[tex]87.5 = \frac{175}{2} = 87 \frac{1}{2} [/tex]

Answer:

7/8 im not 100% sure i could be wrong tho

Answer:

cccccccccccccccçccccccccc

Answer:

if the dot is filled (black) it is ≤ or ≥

if it is not filled it is  < or >

you graph goes from 6 to 10

the unfilled one is 6 the filled one is 10

thus 6 < x ≤ 10

which says x is greater than 6 and also less than or equal to 10

Step-by-step explanation:

9514 1404 393

Answer:

  152.3°

Step-by-step explanation:

The arcsine function only gives angles in quadrants I and IV. Since this is a quadrant II angle, its value will be ...

  θ = 180° -arcsin(0.4649) = 180° -27.7°

  θ = 152.3°

Answer:

x = 1

Step-by-step explanation:

8x = 5x + 3

Subtract 5x from both sides

8x - 5x = 5x - 5x + 3

Simplify

3x = 3

Divide both sides by 3

3x/3 = 3/3

Simplify

x = 1

Answer:

B

Step-by-step explanation:

rearrange 3y = x-3 as x=3y+3 sub in for x in xy=6

(3y+3)(y)=6

solve by factoring 3y^2+3y-6=0

3(y-1)(y+2) = 0

y= 1, -2

sub y back in to either equation but for ease xy=6

x(1)=6 = 6

x(-2)=6 = -3

The skirt = s

The sweater is twice as much so 2s

The total sum has to equal or be less than $75

Inequality = s + 2s <=75

Simplify to 3s <= 75

Most the skirt can cost: solve for s:

3s <= 75

Divide both sides by 3

S <= 25

The most the skirt can cost is $25

Answer:

Inequality: s ≤ 25

Max skirt cost: $25

Step-by-step explanation:

s = skirt cost

x =  sweater cost

Since the sweater costs twice as much as the skirt, an equation will look like this:  

x = 2s

Since her budget is $75, that means she can spend $75 or less but not more, so another equation will look like this:

x + s ≤ 75

Plug 2s into the bottom equation

2s + s ≤ 75

Add up the terms

3s ≤ 75

Divide both sides by 3, the coefficient, to isolate s, the variable.

3s/3 ≤ 75/3

s ≤ 25

That means she can spend $25 or less on a skirt.

Answer:

h(-6) = 3(-6)² - 6(-6) + 4

= 3(36) + 36 + 4

= 148

You basically just substitute x with -6 that's all

Answer:

angle HGD

Step-by-step explanation:

alternate angles are in Z position

Answer: surface area

Step-by-step explanation:

Answer:

1. Natural Number

2. Integer

3. Rational Number

4. Rational Number

5. Irrational Number

6. Rational Number

7. Rational Number

8. Natural Number

9. Irrational Number

10. Integer

11. Irrational Number

12. Natural Number

Answer:

13.41

Step-by-step explanation:

You are so welcomed

The measure of each of the remaining angles in the right angle triangle is 45 degrees.

To find the measure of the remaining angles in the triangle, we can use the fact that the sum of the angles in any triangle is always 180 degrees. Since we know one angle is 90 degrees, we can find the measure of the other two angles by subtracting 90 from 180.

Let's call the remaining two angles A and B. Thus, we have:

Angle A + Angle B + 90 degrees = 180 degrees.

Rearranging the equation, we get:

Angle A + Angle B = 90 degrees.

Since the two sides of the triangle adjacent to the right angle are equal (given as 9 and 9), we can conclude that the remaining two angles are congruent (equal). Let's call the measure of each of these angles x.

Therefore, we have:

x + x = 90 degrees.

Simplifying, we get:

2x = 90 degrees.

Dividing both sides by 2, we find:

x = 45 degrees.

To know more about triangle here

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Answer:

given

f(x).4x+5

fog(x).8x+13

now

fog(x):8x+13

4x+5(g(x)):: 8x+13

g(x):: 8x+13/4x+5

Answer:

g(x) = 2x + 2

Step-by-step explanation:

One is given the following information:

One is asked to find the following:

Remember, (f o g (x)) is another way of representing a composite function. A more visual way of representing this composite function is the following (f(g(x)). In essence, one substitutes the function (g(x)) into the function (f(x)) in places of the varaible (x). Thus, represent this in the form of an equation:

f(g(x)) = 8x + 13

Substitute the given infromation into the equation:

4(g(x)) + 5 = 8x + 13

Solve for (g(x)) in terms of (x). Remember to treat (g(x)) as a single parameter:

4(g(x)) + 5 = 8x + 13

Inverse operations,

4(g(x)) + 5 = 8x + 13

4(g(x)) = 8x + 8

g(x) = (8x + 8) ÷ 4

g(x) = 2x + 2

Answer:

17900

Step-by-step explanation:

First term a = -19

common difference d = -15-(-19) = 4

number of terms, n = 100

sum of first 100 terms,

n/2(2a+(n-1)d)

= 100/2(2×(-19)+(100-1)4)

= 50×(-38+99×4)

= 50×358

= 17900

Sin75° = Sin(30° + 45°)

= Sin30°.Cos45° + Sin45°.Cos30°

= 1/2 . √2/2 + √2/2.√3/2

= √2/2 ( 1/2 + √3/2 )

= √2/2 ((1+√3 ) /2 )

= (√2 + √6 )/ 4

Answer:

Step-by-step explanation:

3/40 is the correct answer

Answer:

where are u from bro?

Step-by-step explanation:

I didn't understand your language.

Answer:

B

Step-by-step explanation:

Secant-secant with vertex outside the circle

1/2(larger-smaller arc)

1/2(114-36)

1/2(78)

39

Answer:

944 is the correct answer

Answer:

the answer it's 944

445+558=1,029

1,029-85=. [944]✓

Answer:

$540.98

Step-by-step explanation:

future value= $ 50,000

number of deposits (n)= 8*12 = 96

rate (r) = 4% per month

= 4÷12 per annum

= 0.33% p.a

i = 0.33÷100

= 0.0033

We know,

Future value of annuity = P÷i [ (1 + i)^n - 1 ]

$50,000 = P÷ 0.0033 [ ( 1+0.0033)^96 - 1]

$50,000 * 0.0033=P [ (1.0033)^96 - 1 ]

$165 = P*0.305

P = $165÷0.305

P = $ 540.98

Rough::

let x= 1.0033)^96

log x = 96 * log (1.0033)

log x = 0.1156

x = Antilog (0.1156)

= 1.305

1.305 - 1 = 0.305

Translate the given point and line together so that you get a new point and a new line that passes through the origin. This turns the problem into finding the distance between the new point,

p = (4, 4, -4) - (-1, 1, 3) = (5, 3, -7)

and the new line,

r*(t) = r(t) - ⟨-1, 1, 3⟩ = ⟨2t, 2t, -3t⟩

Let p = ⟨5, 3, -7⟩, the vector starting at the origin and pointing to p. Then the quantity ||p - r*(t)|| is the distance from the point p to the line r*(t).

Let u be such that ||p - r*(t)|| is minimized. At the value t = u, the vector p - r*(t) is orthogonal to the line r*(t), so that

(p - r*(u) ) • r*(u) = 0

I've attached a sketch with all these elements in case this description is confusing. (The red dashed line is meant to be perpendicular to r*(t).)

Solve this equation for u :

p • r*(u) - r*(u) • r*(u) = 0

p • r*(u) = r*(u) • r*(u)

and x • x = ||x||² for any vector x, so

p • r*(u) = ||r*(u)||²

⟨5, 3, -7⟩ • ⟨2u, 2u, -3u⟩ = (2u)² + (2u)² + (-3u)²

10u + 6u + 21u = 4u ² + 4u ² + 9u ²

17u ² - 37u = 0

u (17u - 37) = 0

==>   u = 0   or   u = 37/17

We ignore u = 0, since the dot product of any vector with the zero vector is 0.

Then the minimum distance distance between the given point and line is

||p - r*(u)|| = ||⟨5, 3, -7⟩ - 37/17 ⟨2, 2, -3⟩|| = √(42/17)

Answer:

1/7 is the probabiltiy

Step-by-step explanation:

Step-by-step explanation:

The prime fractorization of 75 is 3×5×5 or 3×52