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4 years ago

3. Find the value of X 11x-2 19x+3 9x+1 PLEASE LOOK AT PICTURE

Mathematics

1 answer:

Mila [183]4 years ago

5 0

Answer:

x=4

Step-by-step explanation:

1) first write it down --> 11x-2+9x+1=19x+3

2) then combine like terms on the left side of the equation. --> 20x-1=19x+3

3) Then subract 19x on both sides --> x-1=3

4) After add 1 to both sides --> x=4

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The car requires 192 feet to stop from a speed of 48 miles per hour on the same road

Step-by-step explanation:

Direct proportion means that two quantities increase or decrease in the same ratio

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∵ The stopping distance d of an automobile is directly

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- That means d ∝ s²

∴ $\frac{d_{1}}{d_{2}}=\frac{(s_{1})^{2}}{(s_{2})^{2}}$

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- Change the mile to feet

∴ 48 miles/hour = 48 × 5280 = 253440 feet/hour

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- Substitute the values of $d_{1}$ by 75 feet, $s_{1}$ by 158400 feet/hour

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∴ $\frac{75}{d_{2}}=\frac{(158400)^{2}}{(253440)^{2}}$

∴ $\frac{75}{d_{2}}=\frac{25}{64}$

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Step-by-step explanation:

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