HELP!!!!!!
whats the scientific notation of 30 x 10 to the power of -8

Answer:

Many mathematical operations are reversible, meaning you can go not just from A to B, but by the same reason go from B back to A.

Example x + 4 = 7. Subtract 4 from each side to get x = 7 - 4 = 3. But you could, if you wished, go from x = 3 to x + 4 = 7 by simply doing the opposite, adding 4.

Now consider an operation that is NOT reversible.

Example: Given sqrt(x) = x - 2. Square each side to get x = (x - 2)^2 =x^2 - 4x + 4, or

x^2 - 5x + 4 = 0. Factoring gives (x - 1) (x - 4) = 0. So, IF the original equation holds for a real number x, then the only possibilities are x = 1, x = 4.

If you plug x = 4 back into original equation, you get sqrt(4) = 4 - 2, which is true. But, if you plug in x = 1, you get sqrt(1) = 1 - 2, which is NOT true, as sqrt(1) = 1, not -1. The logic of the derivation was that, IF original equation were true, then x could possibly be only 1 and/or 4. In effect, it was really telling you what x is NOT, namely any number besides 1 and 4. Once you test the two “candidates” you see that one works and the other doesn’t.

Why does this happen? It has to do with the fact that square root is only a principal branch. Just as sqrt(16) is only 4 and not -4, so we are dealing with a limited possibility with which to start. Squaring glosses over this, and when you solve a quadratic equation, it generally gives two solutions (not nec. real). Because sqrt(x) started out to be nonnegative, that created the problem at end.

Answer:

-5 is the y intercept.

Step-by-step explanation:

Ok, lets do the steps in order.

1) Make a point-slope form equation.

We know that the format of it is y - y1 = slope(x - x1), so we know have to substitute our information in the equation.

y - 5 = 5(x - 2)

2) Convert our point-slope form equation into slope intercept form, and solve for the y-intercept.

y = slope(x) + b... right? So we now have to do math.

Distribute the right side of the equation to get :

y - 5 = 5x - 10

Now cancel out the -5, and then subtract on both sides.

y = 5x - 5

And -5 is your y intercept :)

Hope this helps! Mark me brainliest :)

Answer:

[tex]\frac{2}{5}[/tex] and [tex]\frac{2}{7}[/tex]

Step-by-step explanation:

We want to work backwards. Currently we have [tex]\frac{ }{ }[/tex][tex]\frac{?}{?}[/tex] ÷ 5 = [tex]\frac{2}{25}[/tex].

If we multiply both sides by 5, we get [tex]\frac{?}{?}[/tex] = [tex]\frac{2}{25}[/tex] × [tex]\frac{5}{1}[/tex].

We can use multiplication of fractions to solve this. To multiply fractions we multiply the two numerators together and multiply the two denominators together, giving an answer of [tex]\frac{?}{?}[/tex] = [tex]\frac{10}{25}[/tex].

This can be simplified to [tex]\frac{2}{5}[/tex].

We can use the same method on the other equation to get an answer of [tex]\frac{2}{7}[/tex].

**This content involves multiplying fractions and questions with the blanks not isolated, which you may wish to practice.

Answer:

highest 7/8, 0.5, -1/4, -1  1/5 lowest

Answer: i'm not certain but i think its -1 1/5 first then -1/4 next is 0.5 then 7/8

once again not certain but i think that's the answer

Hello There!

y-y1=m(x-x1)

y-3=5(x+8)

y-3=5x+40

[tex]y=5x+43[/tex]

Hope this helps!

[tex]GraceRosalia[/tex]

Answer:

22/3

Step-by-step explanation:

because it is

Answer:

D

Step-by-step explanation:

Since the ratio is 3 to 10  it would have to be 3 prizes for every 10 contestants

Answer:

-5/14

Step-by-step explanation:

2/7 times 2 to get the denominator to be 14 since adding and subtracting fractions require the same denominator. 2/7 times 2 = 4/14. -9/14+4/14=-5/14.

make them the same denominator

[tex] \frac{2}{7} \times \frac{2}{2} = \frac{4}{14} [/tex]

[tex] \frac{ - 9}{14} + \frac{4}{14} = \frac{ - 5}{14} [/tex]

Answer:

3

Step-by-step explanation:

J = 16 bags + 5

E= 8 bags +4

If E doubles his cookies, he has 16 bags and 8 extra cookies.

They both have the same amount of bags. 8-5= 3 extra

Answer:

1. D

2. E

3. C

Step-by-step explanation:

f(x)=(5x³-x²-3x+9)+(3x²-x-7)-(3x³+x²-4)

f(x)=(5x³-x²-3x+9)+(3x²-x-7)+(-3x³-x²+4)

f(x)=(2x³-x²-3x+9)+(2x²-x-3)

f(x)=2x³+x²-4x+6

1. D (the degree is the largest value of an exponent)

2. E (the constant term is the number without a variable)

3. C (the leading coefficient is the coefficient of the largest variable exponent in the value)

Answer:

$11.25

Step-by-step explanation:

Divide 30 by 4

30/4=7.50

multiply by 3

7.5*3=22.50

22.50 is 3/4 of her allowance

divide that by half to get how much she spent on snacks.

22.50/2=11.25

Hope this helps!

Answer:

7/8

Step-by-step explanation:

the equation for finding a slope is (y2 - y1) / (x2 - x1)

basically it's the second y minus the first y all divided by the second x minus the first x

-9 - (-2) / -10 - (-2)

-7 / -8

7/8

Answer:

Ashely had 30 kisses! Muah!

Step-by-step explanation:

Ratio of Ashely to Keely is 5 : 2 and we know Keely had 12. Keely represents the 2 in this ratio, and how do we get from 2 to 12? We multiply by 6. We have to multiply by 6 on the other side too then. 5 times 6 is 30, so Ashely had 30 hershey kisses.

In real life, not in ratio form, Ashely had 30 kisses and Keely had 12.

Please mark brainliest if possible, have a nice day! :)

Answer:

C.

Step-by-step explanation:

hope this helps♡^.^^_^

Answer:

C

Step-by-step explanation:

-6 is more to the left of the number line than -3

Answer:

I think It would be B lest goooooooo

Answer: a. -3a^3 - 6a^2 + 7a - 13

Step-by-step explanation:

(-8a^2 + 7a - 9) - (3a^3 - 2a^2 + 4)

-3a^3 -6a^2 + 7a - 13

Answer:

Given that (x-3) (Ax²+bx+c) = x³-7x-6, find the value of A, B and C

Given that (x-3) (Ax²+bx+c) = x³-7x-6, find the value of A, B and C

Answer:

2×3×4=24

Step-by-step explanation:

2×3=6----> 6×4=24

How can I help you with the last two blanks after the 24?

Answer:

2 x 3 x 4 = 24

24 = 24 True

Step-by-step explanation:

I used a calculator :)

Step-by-step explanation:

(a+b)×h

_______

2

= (12 + 12 ) × 26

= (24) × 26

= 624 ÷2

= 312

Answers:

A ' = (-5, 9)

B '  = (3, 6)

C ' = (-6, -1)

=====================================================

Explanation:

When reflecting over the line y = x, we swap the locations of the x and y coordinates. For example, the point (5,7) becomes (7,5)

This means we have the following reflections

This operation is commonly done when determining the inverse of a graph. This is because the inverse basically undoes everything the original function applies. So this "backwards" nature of things means that x becomes y and vice versa.

Answer:

h(-4) = 32.8

h(0) = 12

h(3.5) = -6.2

Step-by-step explanation:

Answer:

20g onions at 50 carrotsat 2tablespoon oil at 30 tomatos 1l vegtable stock

Answer:

18

Step-by-step explanation:

10/0.5 = 20

20 * 0.9 = 18

Answer:

a = 18

Step-by-step explanation:

Step 1: Cross-multiply.

Step 2: Divide both sides by 0.5

Step 3: Check if solution is correct.

Therefore, a = 18.

Explanation:

We have 2 rows and 3 columns, which directly leads to the answer 2 x 3

Always list the number of rows first, followed by the number of columns.

Answer:

Its 3x2

I swear I just took the test

Step-by-step explanation:

Answer:

Step-by-step explanation:

let  x = number of students

Science Center will charge total of 135 + 3x

Dino Discovery Museum will charge total of 6x

for what x the Science Center charge less than the Dino Discovery museum that is

135 + 3x < 6x

135 < 6x - 3x

3x > 135

x > 135/3

x > 45

The Science Center charge less than the Dino Discovery museum for more then 45 students.

45students will the science center charge less than the dino discovery museum

What is Algebra?

One of the many branches of mathematics is algebra. Algebra, which is a common thread throughout practically all of mathematics, is broadly defined as the study of mathematical symbols and the rules for manipulating these symbols in formulas.

Suppose x is the number of Students

Total fees for Science Center will be,

135+3x.

Total fees for the Dino Discovery Museum will be 6x.

The Science Center charges a lower price than the Dino Discovery Museum for what x.

135 + 3x < 6x

135 < 6x - 3x

3x > 135

x > 135/3

x > 45

Hence, For classes with more than 45 Students, the Science Center charges less than the Dino Discovery Museum.

To learn more about Algebra click on the link

https://brainly.com/question/22399890

#SPJ2

Answer:

answer is

frghhfgyyuu67.5

9514 1404 393

Answer:

  a) 191 yards

  b) 40 yards

  c) 1.5 minutes

Step-by-step explanation:

Given:

  ΔPQR is a right triangle with the right angle at Q

  PQ = 40 yards; QR = 70 yards

  M is the midpoint of PR

  jogging rate is 150 yd/min

Find:

  a) the perimeter of ΔPQR to the nearest yard

  b) QM to the nearest yard

  c) the time to jog the path PQMRQP to the nearest tenth minute

Solution:

a) The length of PR can be found from the Pythagorean theorem:

  PR² = PQ² +QR²

  PR² = 40² +70² = 6500

  PR = √6500 ≈ 80.62 . . . . yards

Then the perimeter is ...

  perimeter = PQ +QR +PR = 40 +70 +80.62 ≈ 191 yards

__

b) Segment QM divides triangle PQR into two isosceles triangles: PMQ and RMQ. The lengths MP, MQ, and MR are all equal to half the length of PR.

  QM = PR/2 = (80.62 yd)/2 = 40.31 yd

  QM ≈ 40 yd

__

c) The segments of path PQMRQP can be grouped to simplify the computation of the path length

  PQMRQP = PQ +QM +MR +RQ +QP = PQ +(PQ +QR +(QM +MR))

Since QM +MR = PR, the length in the outer parentheses is the perimeter of the triangle. Then the jogger's total path length is ...

  PQ + perimeter(ΔPQR) = 40 yd +191 yd = 231 yd

The time it takes to jog that path is ...

  time = distance/speed

  time = 231 yd/(150 yd/min) = 1.54 min ≈ 1.5 min

It takes about 1.5 minutes.

Answer:

Memory is the process(cognitive) in which information is encoded,stored and retrieved.