3(x+7)+12x-7(x+1)+9-4x
Need answer and explaintion

Answer:

3333 times

Anymore and you'll have extra

May I have brainliest please? :)

Answer:

3m/hr

Step-by-step explanation:

Answer:

3mph

Step-by-step explanation:

Answer:

x _ a

Step-by-step explanation:

because if a is zero .then they should be subtraction

The answer is B 0.3 because its 3/10 and all of the others is lesss

Answer:

2.47g

Step-by-step explanation:

Given that Ao=14

A(t)= Aoe^kt

k =2yrs

Considering the function where Ao is the initial substance, k is the rate of decay and t is the time.

At the 2nd year A(t) is 7

That is,

7 = 14e^2k

Solve for k

7/14 = e^2k

In(7/14) = 2k

k = In(7/14)÷2

k = In(0.5)/2

k = -0.34657

Hence, A(t)= 14e^-0.34657

So, when t is 5

A(5) = 14e^-0.34657×5

= 2.4749

Approx = 2.47g

Answer: A rotation followed by a reflection. The two figures are congruent because (I'm not sure about this one because I don't know the options that the drop-down menu provides.)

Answer:

14 miles per hour

Step-by-step explanation:

49/3.5= 14

Hope this helps!  

pls mark brainliest if correct

Answer:

14 miles per hour because to find the speed, use the formula speed = distance / time. 49 / 3.5 = 14.

The linear function is given by y = -2000x + 30000

A linear function is a function in the form:

y = mx + b

where y,x are variables, m is the rate of change and b is the y intercept.

Let y represent the value of the car after x years.

From the graph, the line passes through point (0, 30000) and (3, 24000), hence:

[tex]y-30000=\frac{24000-30000}{3-0} (x-0)\\\\y=-2000x+30000[/tex]

Find out more on linear function at: https://brainly.com/question/15602982

Answer: 60 decrease or 150 decrease

Step-by-step explanation:

Answer:

131.25 hope this helps

Step-by-step explanation:

use a calculator

Answer:

Answer: Yes

Step-by-step explanation:

Ratios

Caleb's Jumbo box has 30 cars, 12 of which are convertibles.

This gives a ratio of 12:30. The equivalent fraction of this ratio is:

[tex]\frac{12}{30}[/tex]

This fraction can be simplified by dividing both parts by 6:

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

Thus Caleb's ratio of convertibles is 2:5.

Gabe's Mini box has 4 convertibles out of 10 cars. This gives a ratio of 4:10.

Simplifying by 2, the ratio is 2:5.

It's clear that both boxes have the same ratio of convertibles to total cars.

Answer: Yes

Answer:

your paying for each day 56.66

Answer:

both please brainlist me

Answer:

Step-by-step explanation:

If y y varies directly with x, this is expressed as;

y ∝ x

y = kx

k is the constant of proportionality;

Given

x = 4 and y = 8

Substitute;

8 = 4k

4k = 8

k = 8/4

k = 2

Hence the constant of proportionality k is 2

Answer:

The answer is "The Polar coordinates (r,[tex]\theta)[/tex] =[tex](4,\frac{5 \pi}{6})[/tex]"

Step-by-step explanation:

Given point:

[tex]\to (-2\sqrt{3},2)[/tex]

Formula:

[tex]r=\sqrt{x^2+y^2}\\[/tex]

  [tex]=\sqrt{(-2\sqrt{3})^2+(2)^2}\\\\=\sqrt{12+4}\\\\=\sqrt{16}\\\\=\sqrt{4^2}\\\\=4[/tex]

[tex]\therefore \\\\ \tan \theta= \frac{y}{x}\\\\[/tex]

[tex]\tan \theta=\frac{2}{-2\sqrt{3}}\\\\ \tan \theta= -\frac{1}{\sqrt{3}}\\\\ \tan \theta= \frac{5\pi}{6}\\\\ \theta= \frac{5\pi}{6}[/tex]

The Polar coordinates (r,[tex]\theta)[/tex] =[tex](4,\frac{5 \pi}{6})[/tex].

Answer:

5:6 + 7:8 = 12:14

Jan will have 12 marbles

Kim will have 14 marbles

Jan and Kim own 40 and 48 marbles respectively.

Important information:

We need to find the initial number of marbles each own.

Let the initial number of marbles be [tex]5x[/tex] and [tex]6x[/tex].

Jan gains 2 more marbles and the ratio is 7:8. So,

[tex]\dfrac{5x+2}{6x}=\dfrac{7}{8}[/tex]

[tex]8(5x+2)=7(6x)[/tex]

[tex]40x+16=42x[/tex]

Isolate the variable.

[tex]16=42x-40x[/tex]

[tex]16=2x[/tex]

[tex]\dfrac{16}{2}=x[/tex]

[tex]8=x[/tex]

Now, find the initial number of marbles.

[tex]5(8)=40[/tex]

[tex]6(8)=48[/tex]

Therefore, Jan and Kim own 40 and 48 marbles respectively.

Find out more about 'Ratio' here:

https://brainly.com/question/16054658

Answer:

x = -2i and x = 2i

x = 3 and x = - 3

Step-by-step explanation:

x^4 - 5x^2 - 36 = 0

let u = x^2 and substitute

we have:

u^2 - 5u - 36 = 0

(u - 9)(u + 4) = 0

u = 9 and u = - 4

substitute back for u

x^2 = 9

x = 3 and x = - 3

x^2 = -4 -- i am going to assume you've learned imaginary numbers; otherwise, you cannot take the square root of a negative number.

x = -2i and x = 2i

Answer:the sum of the first 20 terms of the sequence 50, 100, 150,.... is equal to

Step-by-step explanation:

Answer:

Just subtract, 400 - 50 = 350, 350 - 50 = 300....etc until you reach (8,0) point on the graph. Graph a straight line down from starting point (0,400) on graph to (8,0). This is your answer subtract 50 from 400 until you reach 0. Starting point (0,400) and ending point (8,0), it's a straight line down ward..

Step-by-step explanation:

Answer:

no 150% of 36 is 54

Step-by-step explanation:

its 54 btw

Answer:

1: A

2:C

3: B

4:27

5:16

6:1

Answer:

i think it might be segment BW

Step-by-step explanation:

15 volume of the fish tank

Answer:

71

Step-by-step explanation:

Answer:

-0.4

Step-by-step explanation: