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Misha Larkins [42]

3 years ago

12

Please help its a test. explain and select all statements that are true

2 answers:

lapo4ka [179]3 years ago

7 0

B &D are Correct

B explanation: The variable is the 3, as the 3 is the amount per ride but we don’t know how many rides so you would multiply the unknown (x) by the 3, so this answer would be correct.

D explanation: if you replace the four with the x for both they both equal $28.

Otrada [13]3 years ago

5 0

Answer:

i think b and d

Step-by-step explanation: the $4.75 per mile and $3 per mile represent the "m" in y=mx+b. you have to multiply 4.75 by the number of miles travelled, and add that to the $9 additional fee to find the total amount charged. for the "driveyou" equation, you multiply $3 by the number of miles travelled, which is "x" in the equation. hope that helps, i'm new to brainly :)

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I’m confused on what’s going on here, so if someone could explain it I would be super grateful.

pshichka [43]

<h2>Range of x </h2><h3> $-\frac{1}{5}$ and x>6</h3><h3>Step-by-step explanation:</h3>

Given AB = 4x + 5, BC = 3x - 2 and AC 9x -5

The sum of the length of any two sides of a triangle is greater than the length of third side.

Case I

AB + BC > AC

⇔4x +5 +3x -2 > 9x -5

⇔7x + 3 >9x - 5

⇔ 7x -9x > -5 -3

⇔-2x > -8

⇔x <4

Case II

if AB+AC > BC

4x +5 +9x -5> 3x -2

⇔13x >3x -2

⇔ 13x -3x> -2

⇔10x > -2

⇔x > $-\frac{1}{5}$

Case III

AC+BC > AB

⇔9x - 5 +3x - 2 > 4x +5

⇔6x -7 > 4x +5

⇔6x -4x >5+7

⇔2x > 12

⇔x > 6

8 0

3 years ago

PLEASE HELP!!!!

den301095 [7]

Answer:

multiplication

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Solve equation, check for extraneous solutions

fiasKO [112]

Start with

$1=\dfrac{1}{n^2}+\dfrac{n^2-4n-5}{3n^2}$

We observe that both fractions are not defined if $n=0$ . So, we will assume $n \neq 0$ .

We multiply both numerator and denominator of the first fraction by 3 and we sum the two fractions:

$1=\dfrac{3}{3n^2}+\dfrac{n^2-4n-5}{3n^2} = \dfrac{n^2-4n-2}{3n^2}$

We multiply both sides by $3n^2$ :

$n^2-4n-2=3n^2$

We move everything to one side and solve the quadratic equation:

$2n^2+4n+2=0 \iff 2(n^2+2n+1)=0 \iff 2(n+1)^2=0 \iff n+1=0 \iff n=-1$

We check the solution:

$1=\dfrac{1}{1}+\dfrac{1+4-5}{3} \iff 1 = 1+0$

which is true

8 0

3 years ago

Write this ratio in one other way 7/13

Ierofanga [76]

You can write this ratio in two other ways:

7 to 13

7 : 13

5 0

3 years ago

Read 2 more answers

HELP ASAP!! 100 POINTS!!<br><br> describe how you would plot the point (-4, 3)

fredd [130]

Answer:

Hi!

First you would start at -4 on the x-axis, then you would move up 3 spaces and put your point there.

The x-axis is the horizontal line, and the y-axis is the vertical line.

I hope this helps you!

6 0

3 years ago

Read 2 more answers