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3 years ago

Please help! Brainliest!!!!! 50 points!

Mathematics

2 answers:

ss7ja [257]3 years ago

8 0

Answer:

5,0 on the x-axis, 0,6 on the y-axis, 8. 7,2. 3 on Q1, -1,10 on Q2, -1/4, -6 1/2 on Q3, 5, -2 on Q4.

Step-by-step explanation:

Papessa [141]3 years ago

7 0

Answer:

your answer is 5,0 on the x-axis, 0,6 on the y-axis, 8. 7,2. 3 on Q1, -1,10 on Q2, -1/4, -6 1/2 on Q3, 5, -2 on Q4.

Step-by-step explanation:

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slavikrds [6]

Answer:

The answer is

$\frac{2s}{n} - l = a$

Step-by-step explanation:

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3 years ago

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3 years ago

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5 0

3 years ago

BRAINLIEST ASAP! PLEASE HELP ME :)

Margaret [11]

Answer:

$\large \boxed{\text{3.0 mi/h}}$

Step-by-step explanation:

Let x = the current of the river

Then 21 + x = the speed going downstream (with the current)

a nd 21 - x = the speed going upstream (against the current)

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$\begin{array}{rcll}\dfrac{2.4}{21+ x}& = & \dfrac{1.8}{21 - x} &\\\\2.4& = &(21 + x) \dfrac{1.8}{21 - x} &\text{Multiplied each side by (21 + x)}\\\\2.4(21 - x)& = & 1.8(21 + x) &\text{Multiplied each side by (21 - x)}\\50.4 - 2.4x&=& 37.8 + 1.8x&\text{Removed parentheses}\\50.4 & = & 37.8 + 4.2x & \text{Added 2.4x to each side}\\\end{array}\\$

$\begin{array}{rcll}12.6 & = & 4.2x & \text{Subtracted 37.8 from each side}\\x & = &\dfrac{12.6}{4.2}&\text{Divided each side by 4.2}\\\\ & = &\mathbf{3.0}& \text{Simplified}\\\\\end{array}\\\text{The current is $\large \boxed{\textbf{3.0 mi/h}}$}$

Check:

$\begin{array}{rcl}\dfrac{2.4}{21+ 3}& = & \dfrac{1.8}{21 - 3}\\\\\dfrac{2.4}{24}& = & \dfrac{1.8}{18}\\\\0.10 & = & 0.10\\\end{array}$

4 0

3 years ago