All categories

3 years ago

6/15=3/x solve for x

Mathematics

2 answers:

nlexa [21]3 years ago

7 0

Answer: 7.5

Step-by-step explanation:

• Cross multiply : start by multiplying 15 times 3

• You get 45, then you divide 45 by 6

• Therefore, this gives you 7.5

• Check your answer by plugging in 7.5 to x

• Both fractions should equal 0.4, meaning they are equal to each other

denis23 [38]3 years ago

3 0

Answer:15/2

Step-by-step explanation:

You might be interested in

Please help <br><br> For 20 points

tester [92]

Answer:

Step-by-step explanation:

Vertex: ( -2, -25)

Axis of symmetry: -2

3 0

2 years ago

Could somebody please help me? I'm struggling with this question:(

elena-14-01-66 [18.8K]

Answer:

Slope is the charge per hour, y-intercept is the flat fee earned by Nicole and the equation to find the cost per hour is $C=m(h)+3$

For $5$ hours of babysitting amount earned is $28\$$ .

Step-by-step explanation:

From the given data lets assign time on x-axis and the amount earned on y-axis.

We have to choose two points.

$(x_1,y_1)=(3,18)$ and $(x,y)=(5,28)$

By applying point slope form we have to find the slope of the points.

Slope (m) $= \frac{y-y_1}{x-x_1} =\frac{28-18}{5-3} =\frac{10}{2} =5$

Here slope is representing per hour charge of Nicole for babysitting.

Now lets find the y-intercept value by plugging the values of $(x,y)$ in standard equation of line that is $y=mx+b$ ,equivalent to $C=m(h)+b$ where $b\\$ is the y-intercept.

The equation for cost (C), $C=m(h)+3$ , $h$ is the number of hours.

$b=C-m(h), b=28-5(5), b=28-25=3$

This y-intercept $(b=3)$ is representing the flat fee Nicole will charge for babysitting.

Now

For $5$ hours cost we will put $h=5$ in the equation of cost.

$C=5h+3,C=5(5)+3=28\$$

For $5$ hours of baby sitting Nicole will earn an amount of $C=5(5)+3=28\$$

So our final answers are equation of cost $=C=m(h)+3$ , y-intercept is the flat fee and slope is the charge per hour.For $5$ hours amount earned is $28\$$ .