A bag contains 120 marbles. Some are red and the rest are black. There are 19 red marbles for every black marble. How many red marbles are in the bag? Explain your reasoning.

Answer:

a7=-1

Step-by-step explanation:

Arithmetic Sequences

The arithmetic sequences can be identified because each term n is obtained by adding or subtracting a fixed number to the previous term n-1.

The equation to calculate the nth term of an arithmetic sequence is:

[tex]a_n=a_1+(n-1)r[/tex]

We know: a12=29, a16=53, now we use the above equation for n=12 and n=16:

[tex]a_1+(12-1)r=29[/tex]

[tex]a_1+(16-1)r=53[/tex]

Simplifying both equations:

[tex]a_1+11r=29[/tex]

[tex]a_1+15r=53[/tex]

Subtracting:

[tex]4r=53-29=24[/tex]

Solving:

r=24/4

r=6

The 7th term can be found as 9 terms before the 16th:

[tex]a_7=a_{16}-9r[/tex]

[tex]a_7=53-9*6=53-54=-1[/tex]

Thus: a7=-1

Answer:

i think its −2x+y=−5

Step-by-step explanation:

 -2x +y= -11 is the equation of this line in Standard Form .

What is in slope-intercept form?

m = 2

the point =  (4,-3)

the equation of this line

          y - y₁ = m ( x - x₁)

          y - ( -3 ) = 2 ( x - 4 )

          y + 3 = 2( x - 4 )

           y + 3 = 2x - 8

            y = 2x - 8 - 3

            y = 2x - 11

           -2x +y= -11

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Answer:

D

Step-by-step explanation:

Answer:

D)4.9 x 10^-4

Step-by-step explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10

If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Answer:

They should expect 165 damaged pieces in 5500 jewelry pieces

Step-by-step explanation:

The first thing we need to do is to get some metrics to measure the rate at which the damaged jewelry is seen.

We can use 15 pieces of jewelry that are damaged for every 500 ordered.

Once this is done, we can then use this to estimate how many pieces of jewelry are damaged if 5,500 are ordered.

We now need to know how many sets of 500 pieces of Jewelry are in 5,500.

This is 5,500/ 500 = 11 sets

Therefore, all 11 sets will have 15 damaged pieces of jewelry each. The total number of damaged jewelry pieces will be 15 X 11 = 165 damaged pieces

Answer:

Step-by-step explanation:

Correct order of the steps

The order D, B is same as B, D

Answer:

salah kamu nilai ku jadi jelek kamu harus bertanggung jawab

Answer:

Step-by-step explanation:

Pertains to y-intercept is then 0.

It introduces the relationship between two variables and is called correlation. Proportionality or variation is state of relationship or correlation between two variables It has two types: direct variation or proportion which states both variables are positively correlation. It is when both the variables increase or decrease together. On the contrary, indirect variation or proportion indicates negative relationship or correlation. Elaborately, the opposite of what happens to direct variation. One increases with the other variables, you got it, decreases. This correlations are important to consider because you can determine and identify how two variables relates with one another. Notice x = y (direct), y=1/x (indirect)

Answer:

f(- 2) = - 4

Step-by-step explanation:

To evaluate f(- 2) substitute x = - 2 into f(x) , that is

f(- 2) = (- 2)² + 3(- 2) - 2 = 4 - 6 - 2 = - 4

Value of f(-2) is -4

Given that;

f(x) = x²+3x-2

Find;

Value of f(-2)

Computation:

Given that;

f(x) = x²+3x-2

By putting x = -2

f(-2) = (-2)² + 3(-2) - 2

f(-2) = 4 - 6 - 2

f(-2) = 4 - 8

f(-2) = -4

So, -4 is the correct answer to the given equation.

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Answer:

B. y=5/4 x-4

Step-by-step explanation:

Slope of line= [tex]\frac{y2-y1}{x2-x1}[/tex]

= [tex]\frac{1-(-4)}{4-0}[/tex]

=5/4

Answer:

9

Step-by-step explanation:

Answer:

Yes!

Step-by-step explanation:

Because it passes the vertical line test.

Answer:

no, because if you use vertical line test the graph would have intersects many times.

3588.3 thats the answer

Answer:

[tex]y-1/2=2(x+7/2)^2[/tex]

Step-by-step explanation:

Equation of the Quadratic Function

The vertex form of the quadratic function has the following equation:

[tex]y-k=a(x-h)^2[/tex]

Where (h, k) is the vertex of the parabola that results when plotting the function, and a is a coefficient different from zero.

The given function is:

[tex]y=(x+3)^2+(x+4)^2[/tex]

Expanding the squares:

[tex]y=x^2+6x+9+x^2+8x+16[/tex]

Simplifying:

[tex]y=2x^2+14x+25[/tex]

Factoring 2 from the first two terms:

[tex]y=2(x^2+7x)+25[/tex]

The expression in parentheses must be completed to form the square of a binomial:

[tex]y=2(x^2+7x+49/4-49/4)+25[/tex]

Isolating the square of the binomial:

[tex]y=2(x^2+7x+49/4)-49/2+25[/tex]

Operating and Factoring:

[tex]y=2(x+7/2)^2+1/2[/tex]

Rearranging:

[tex]\boxed{y-1/2=2(x+7/2)^2}[/tex]

Comparing with the vertex form:

a=2, h=-7/2, k=1/2

Answer:

C

Step-by-step explanation:

C is the answer becuase it is a negative number less than -0.625

[tex]v + 8 < 3[/tex]

Subtract sides -8

[tex]v + 8 - 8 < 3 - 8[/tex]

[tex]v < - 5[/tex]

_________________________________

[tex]8v < - 40[/tex]

Divided sides by 8

[tex] \frac{8}{8}v < \frac{ - 40}{8} \\ [/tex]

[tex]v < - 5[/tex]

_________________________________

Done.... ♥️♥️♥️♥️♥️

The solution of the given inequality v +8 <3 or 8v <-40 is v < -5.

A difference between two values indicates whether one is smaller, larger, or basically not similar to the other.

A mathematical phrase in which the sides are not equal is referred to as being unequal.

Given the inequality,

v +8 < 3

Adding -8 on both sides

v + 8 - 8 < 3 - 8

v < -5

Or,

8v <-40

Divide 8 on both side

v < -5

Hence "The solution of the given inequality v +8 <3 or 8v <-40 is v < -5".

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Answer:

35 children for every 1 bus

Step-by-step explanation: :) i hope i helped

Point C

Hope This helps!! : }

The point D represents the product of the three integers.

Number line is defined as the straight line drawn horizontally where the integers are placed at an equally spaced way.

Integers includes natural numbers, 0 and negative of the natural numbers.

Given is the three numbers 5, -2 and -1.

We have to find the product of these three numbers.

When multiplying integers, negative multiplied to negative and positive multiplied to positive gives positive. If one of the number is negative and other is positive, then the result is negative.

(5) (-2) (-1) = (5 × -2) (-1)

                = (-10) (-1)

                = 10

Hence the product of the three integers 5, -2 and -1 is 10 which is marked as point D on the number line.

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Answer:

the answer should be w=-E/hf

if it not plz tell me so i can edit  my answer

Step-by-step explanation:

Hope this helps❤️

Answer:

hf-E

Step-by-step explanation:

I took the test

Answer:

D 17.43

Step-by-step explanation:

3.5 times 3.63 equals 12.67 and 2 1/3 times 2.04 equals 4.76.  When you add them together you get 17.43.

The exact change Rodney needs to take with him to the produce stand is 17.42 dollars.

A unitary method is a mathematical technique for obtaining the value of a single unit and then deriving the required units by multiplying it with the single unit.

The exact change Rodney needs to take with him to the produce stand is the price of 3.5 pounds of cherries which is (3.5×3.62) dollars = 12.67 dollars added to the price of 2.33 pounds of peaches which is (2.33×2.04) dollars = 4.75 dollars.

∴ The total amount is (12.67 + 4.75) dollars.

= 17.42 dollars.

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Answer:

i is a

Step-by-step explanation:

Answer:

( -2,5)

Step-by-step explanation:

To find the x coordinates of the midpoint, add the x coordinates of the endpoint and divide by 2

( -9+5)/2 = -4/2 = -2

To find the y coordinates of the midpoint, add the y coordinates of the endpoint and divide by 2

( 3+7)/2 = 10/2 = 5

The midpoint is ( -2,5)

Answer:

$1,054

Step-by-step explanation:

i dont have explination pls dont remind me

Step-by-step explanation:

2x + 2x + x + x = Perimeter

6x = Perimeter

x = Perimeter ÷ 6