A family gathered 20 small sea shells from the beach brining the total number of small seashells in their collection to 41.

Which equation can be used to find, x, the number of small sea shells in the collection before the 20 were added


A:. 20_x =41

B:. x- 21 =41

C:. x + 20 =41

D:. 20x=41





HELPPPP
EXCEPT PT TH 20_x UNDER EACHOTHER PLS​

Answer:

- 3r + 18

Step-by-step explanation:

7r - 8r - 2r + 13 + 5 = 7r - 10r + 18

Answer:

-3

Step-by-step explanation:

that’s where the line intercepts with the y axis

Answer:

-3,0 is y intercept good luck

Answer:

t+4 / t-4

Step-by-step explanation:

(t^2 - 16) / (t^2 -8t +16)

=( t^2 - 4^2) / (t^2 - 2*4*t + 4^2)

by formula a^2 - b^2 = (a+b)(a-b)

= (t+4)(t-4)  / (t-4)^2

= (t+4)(t-4)  / (t-4)(t-4)

= t+4 / t-4

the answer is B

P/s : i use my calculator

ok done. Thank to me :>

Option A is the answer

A

Step-by-step explanation:

just trust me that is the correct answer

Answer:-4.683

Step-by-step explanation:

Took the test

Answer:

24 rows

Step-by-step explanation:

384 seats in total, and 16 chairs in a row, so 384/ 16=

24 rows

Hope this helps!

LMK if it does

Answer:

linear

Step-by-step explanation:

Answer:

Step-by-step explanation:

ASSUMING the usage fees are daily fees

120 = 3x - 6

126 = 3x

x = 42 books

Answers:

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

Explanation:

The left hand side is

[tex]-6\begin{bmatrix}3 & -1 & 3\\8 & x & -9\\4 & -1 & y\end{bmatrix}[/tex]

That -6 outside the matrix is multiplied with each item inside the matrix. This is known as scalar matrix multiplication. Effectively, it's very similar to the idea of the distributive property.

So for the first row, we have the three columns of: -6*3 = -18 and -6*(-1) = 6 and -6*3 = -18

The other two rows are handled the same way. This is what should result:

[tex]-6\begin{bmatrix}3 & -1 & 3\\8 & x & -9\\4 & -1 & y\end{bmatrix}= \begin{bmatrix}-18 & 6 & -18\\-48 & -6x & 54\\-24 & 6 & -6y\end{bmatrix}[/tex]

From here, you'll then match up the terms in the given right hand side matrix. The top row has the variable 'u' in the middle, which matches with the '6' in the middle of the top row shown. Therefore, u = 6.

-----------------------------

Now to the second row.

The -48 in the first spot pairs up with the w in the other matrix. So we can see that w = -48. Similarly, we have v = 54.

Also, we have -6x in the middle which matches with the 6 in the same corresponding spot. Solving -6x = 6 leads to x = -1.

-----------------------------

Finally, the third row.

There's only one variable here and that's the variable y in the bottom right corner. It pairs up with 0 in the same corresponding spot for the right hand side matrix. Therefore, y = 0.

Answer:

The answer is 101100

Answer:

(x-1) (x-4) is the answer

(f o h)(-1) = ...

= f(h(-1))

= f(-1 + 2)

= -2(-1 + 2) - 1

= 2 - 4 - 1

= -2 - 1

= -3

Answer:

i cannot answer this because i do not know hw much money he has made.

Step-by-step explanation:

Answer:

You need 1 cup of sugar.

Step-by-step explanation:

16/20 = 4/5

1 1/4 = 5/4

5/4 x 4/5 = 1

You need 1 cup of sugar.

Answer:

Step-by-step explanation:

The number of black pieces is 5 more than 3 times the white pieces:

Let the number of rounds is x.

Initial number of white nd black pieces:

Substitute the values of b and w into first equation and find the value of x:

Find the number of pieces:

Correct choice is D

Answer:

A game consists of black and white pieces. The number of black pieces is 5 more than 3 times the white pieces. Seven white and 15 black pieces are removed each round. After several rounds, there are 3 white and 56 black pieces left. How many pieces were there in the beginning?

A. 52

B. 158

C. 210

D. 213

E. 218

Answer:

It's a minimum, at (8, -3)

Step-by-step explanation:

Option 1: you unwrap the square , add like terms, and then recognize it's a parabola and find the coordinates of the vertex.

Or look at it as -3 + something ^2. It means you are adding something positive to -3, so the sum is greater or equal to -3, that is the definition of a minimum. At that point you find the minimum by setting that something equal to 0 (which gives you x = 8) and the value is -3 + 0 = -3

Answer:

d

Step-by-step explanation:

you need to type it in the calculator and solve it

Answer:

?? i don't know the answer

Answer:

17

Step-by-step explanation:

2+5×3

2+15

17

7/20

Step-by-step explanation:

21 ÷ 3 = 7

21 - 1 = 20

7/20

Answer:

I still can't open the file or I can't see it

Step-by-step explanation:

Answer:

45

Step-by-step explanation:

This is a combination question: how many ways can you pick 2 people from a group of 10?

Using the notation C(10, 2) for the number of combinations of 10 things chosen 2 at a time...

[tex]C(10, 2)=\frac{10!}{2!(10-2)!}=\frac{10!}{2!\cdot 8!}=\frac{10\cdot 9}{2\cdot 1}=45[/tex]

Step-by-step explanation:

emergency ? why ? you are in the middle of a game with such an unfair die ?

the probabilty for a number of a regular die is 1/6 (desired cases divided by total possible cases).

the probability to role an even number is therefore 3/6 = 1/2.

that means, even and odd are the 2 possible outcomes.

now, for the unfair die we can see it as if we have now 4 possible outcomes : 3 times an even number, and 1 time an odd number.

so, the probability to roll an even number is 3/4 (and for an odd number 1/4).

now, we roll it twice.

for the sum to be even, we either have to roll 2 even numbers or 2 uneven numbers.

the probabilty is the sum of the both probabilities (it is an exclusive "or" relationship).

the probability to roll 2 even numbers is

3/4 × 3/4 = 9/16

the probability to roll 2 uneven numbers is

1/4 × 1/4 = 1/16

the sum is

9/16 + 1/16 = 10/16 = 5/8

so, E is the right answer.

The hourly rate is 60, so multiply 60 by the number of hours (h) and add the fee:

Answer: 60h + 35