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3 years ago

Please help, as you can see I already tried but failed.

Mathematics

1 answer:

lorasvet [3.4K]3 years ago

4 0

I'm unsure but i think it is three more than 9 times a number is atleast 5 times the number

You might be interested in

36 is 120% of what number

nadezda [96]

Let, the number = x
Then,x * 120% = 36
x * 1.20 = 36 [ 120% = 1.20 ]
x = 36 / 1.20
x = 30

In short, Your Answer would be 30

Hope this helps!

6 0

3 years ago

Read 2 more answers

Use deductive reasoning to prove that x = 10 is the solution equation 3x – 7 = 23. Be sure to

Sphinxa [80]

Answer:

Step-by-step explanation:

3x-7=23

<=> 3x = 23 + 7

<=> 3x = 30

<=> X = 30 ÷ 3

<=> X = 10

5 0

3 years ago

Is this right i dont know smo help

bezimeni [28]

Answer:

D. multiplication property

Step-by-step explanation

Am not so sure but i think its that

7 0

3 years ago

a local library shows movies on Thursday evening.the library administrator has chosen the next 6 movies he will show , but he ha

Natali [406]

For the first movie he has 6 choices, then for the second since he has chosen the first there are only 5 left, then for the third there are only 4 choices left and so on.

Therefore the answer is 6!=6*5*4*3*2=720 orderings

7 0

4 years ago

Read 2 more answers

A rocket is shot off from a launcher. The accompanying table represents the height of the rocket at given times, where x is time

galben [10]

Answer:

The height at time of 12.1 seconds is approximately 729.2562 feet

Step-by-step explanation:

The general form of the quadratic regression equation is y = A + Bx + Cx²

The quadratic regression formula is given as follows;

$B = \dfrac{S_{xy}S_{x'x'}-S_{x'y}S_{xx'}}{S_{xx}S_{x'x'} -(S_{xx'})^2}$

$C = \dfrac{S_{x'y}S_{xx}-S_{xy}S_{xx'}}{S_{xx}S_{x'x'} -(S_{xx'})^2}$

$A = \bar y - B \bar x - C \bar {x^2}$

$S_{xx} = \Sigma (x_i - \bar x)^2$

$S_{xy} = \Sigma (x_i - \bar x)(y_i - \bar y)$

$S_{xx'} = \Sigma (x_i - \bar x)(x^2_i - \bar {x^2})$

$S_{x'x'} = \Sigma (x^2_i - \bar {x^2})^2$

$S_{x'y} = \Sigma (x^2_i - \bar {x^2})(y_i - \bar {y})$

Solving using an online quadratic regression calculator, gives;

A = 2.5643259

B = 246.6374865

C = -15.41986006

Substituting gives;

y = 2.5643259 + 246.6374865·x -15.41986006·x²

When time, x = 12.1, we have;

y = 2.5643259 + 246.6374865×12.1 -15.41986006×12.1²≈ 729.2562 feet

The height at time of 12.1 seconds ≈ 729.2562 feet.

8 0

3 years ago