Ask question

Ask question

All categories

4 years ago

8

Garret hiked 14 miles in 4 hours. Elena hiked 21 miles in 6 hours. Do these rates demonstrate a proportional relationship? Why o

r why not?

1 answer:

Amanda [17]4 years ago

8 0

They are proportional
14 divided by 4 equals 3.5
21 divided by 6 equals 3.5

You might be interested in

Plz help me 5th grade work

likoan [24]

Answer:

228 chocolate chips

Step-by-step explanation:

I don't really know the methods you used because I didn't use them in 5th grade. But the answer is 228 chips.

38 + 38 + 38 + 38 + 38 + 38 = 228

7 0

3 years ago

Read 2 more answers

Find the shaded area. Round your answer to the nearest tenth.

Fofino [41]

Answer:

${22cm}^{2}$

to the nearest tenth

Step-by-step explanation:

find the area of the semi circle

$\frac{\pi \times 5}{2} = {7.85cm}^{2}$

find area of the whole shape

$5 \times 6 = {30cm}^{2}$

then subtract both areas to get shaded area

$30 - 7.85 = 22.15$

7 0

3 years ago

Simplify completely..........

vitfil [10]

Answer:

$\frac{x}{x-1}$

Step-by-step explanation:

$\frac{3x^2 - 1}{x^2 - 1} - \frac{2x + 1}{x + 1}$ $[ \ x^ 2- 1 = (x-1)(x + 1) \ ]$

$= \frac{3x^2 - 1}{(x-1)(x + 1 )} - \frac{2x + 1}{x + 1}\\\\=\frac{(3x^2 - 1)-(2x + 1)(x-1)}{(x + 1)(x-1)}$ $[\ Taking \ LCM \ ]$

$= \frac{(3x^2 - 1)- (2x^2 - 2x + x - 1)}{(x+1)(x-1)}\\\\=\frac{3x^2 - 1 - 2x^2 + x + 1 }{(x+1)(x-1)}\\\\=\frac{x^2 +x}{(x+1)(x-1)}\\\\=\frac{x(x+1)}{(x+1)(x-1)}\\\\=\frac{x}{x-1}$

<em><u>Finding LCM :</u></em>

Example :

$\frac{1}{6} + \frac{1}{3}$

6 = 2 x 3

3 = 1 x 3

$\frac{1}{2 \times 3} + \frac{1}{ 3}$ $= \frac{1}{2 \times 3} + \frac{1 \times 2}{ 3 \times 2}$

[ To make the denominators same : the second fraction is multiplied and divided by 2 ]

Similarly :

$(x^2 - 1 ) = (x -1)(x+1)\\\\(x + 1) = 1 \times (x + 1)$

Same rule we applied : multiplied the numerator and denominator of the second term with ( x - 1 )

Therefore the second term becomes ,

$\frac{2x + 1}{x + 1} = \frac{(2x + 1)(x - 1)}{(x + 1)( x - 1)}$

7 0

3 years ago

Please help me with this as well

Len [333]

Answer:

$y = \dfrac{3 + 6\sqrt{2}}{4} ~~~\textrm{and}~~~y = \dfrac{3 - 6\sqrt{2}}{4}$

Step-by-step explanation:

$(4y - 3)^2 = 72$

$4y - 3 = \pm\sqrt{72}$

$4y - 3 = \pm 6\sqrt{2}$

$4y = 3 \pm 6\sqrt{2}$

$y = \dfrac{3 + 6\sqrt{2}}{4}~~~\textrm{or}~~~y = \dfrac{3 - 6\sqrt{2}}{4}$

5 0

3 years ago

What is the mean of 9, 25, and 53?<br><br> 3<br><br> 9<br><br> 25<br><br> 29

malfutka [58]

Answer:

29

Step-by-step explanation:

9 + 25 + 53

87

87 ÷ 3

29

4 0

3 years ago

Read 2 more answers