3 years ago

**Two trains are traveling at constant speeds on different tracks. What is the speed of Train B? *

Mathematics

1 answer:

Eduardwww [97]3 years ago

4 0

Answer:

um what?

Step-by-step explanation:

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Marco wants to sell his marble collection at a yard sale. He has 112 marbles that he wants to put in bags with 8 marbles in each

OLEGan [10]

marco ill have 14 bags total :)

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3 years ago

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Which of the following is an extraneous solution of the square root of -3x-2=x+2

yarga [219]

Answer:

x=-6 is an extraneous solution

Step-by-step explanation:

we have

$\sqrt{-3x-2} =x+2$

squared both sides

$-3x-2=(x+2)^2$

$-3x-2=x^2+4x+4$

$x^2+7x+6=0$

solve the quadratic equation by graphing

The solution is x=-6 and x=-1

see the attached figure

Verify each solution

substitute the value of x in the original expression

For x=-6

$\sqrt{-3(-6)-2} =-6+2$

$\sqrt{16} =-4$

$4=-4$ ----> is not true

Is an extraneous solution

For x=-1

$\sqrt{-3(-1)-2} =-1+2$

$\sqrt{1} =1$

$1=1$ ----> is true

Is the solution

4 0

3 years ago

PLEASE HELP ME W THIS QUESTION

snow_lady [41]

Answer:

Step-by-step explanation:

If the side of the shape is increased by 3/2 then the total distance around the shape will be 3/2 bigger.

Example: If the pentagon has side length 2 then it becomes 2*3/2 = 6/2 = 3.

The original perimeter was 2+2+2+2+2 = 10.

The new perimeter is 3+3+3+3+3 = 15.

Did you notice that $\frac{15}{10}=\frac{3}{2}$ ? J is correct.

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3 years ago

33 more than the product of 7 and a number x is less than 26.

iogann1982 [59]

7x +33 < 26 isolate the term with a variable by subtracting 33
7x < -7 divide by 7
x < -1

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3 years ago

What is the square root of 50x^4

love history [14]

Answer:

5x²√2

Step-by-step explanation:

√50 $x^{4}$

The square root of x^4 is x².

The square root of 50 is 5√2.

Multiplying those two gives us 5x²√2

6 0

3 years ago