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2 years ago

6

What is the ratio of the two quantities? Warning: different units! a 4 seconds to 2 min

1 answer:

lesya692 [45]2 years ago

8 0

Answer:

Step-by-step explanation:

4sec:2min

2min=120sec

4:120

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Solve the equations by substitution method: A. 2x-y-3=0 and 3x+4y=65.

PSYCHO15rus [73]

Step-by-step explanation:

$\sf 2x-y-3=0\dots \dots (1)$

$\sf 3x+4y=65 \\ \implies\sf 3x+4y-65=0 \dots\dots(2)$

from eq (1)

${:}\longrightarrow$ $\sf 2x-y-3=0$

${:}\longrightarrow$ $\sf 2x-3=y$

${:}\longrightarrow$ $\sf y=2x-3 \dots\dots(3)$

Substitute the value in eq(2)

${:}\longrightarrow$ $\sf 3x+4y-65=0$

${:}\longrightarrow$ $\sf 3x +4 (2x-3)-65=0$

${:}\longrightarrow$ $\sf 3x+8x-12-65=0$

${:}\longrightarrow$ $\sf 11x-77=0$

${:}\longrightarrow$ $\sf 11x=77$

${:}\longrightarrow$ $\sf x={\dfrac {77}{11}}$

${:}\longrightarrow$ $\sf x=7$

Substitute the value in eq (3)

${:}\longrightarrow$ $\sf y=2x-3$

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${:}\longrightarrow$ $\sf y=11$

$\therefore$ ${\underline{\boxed{\bf (x,y)=(7,11)}}}$

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2 years ago

For the graph y = 1 find the slope of a line that is perpendicular to it and the slope of a line parallel to it. Explain your an

MakcuM [25]

y = 1 is a horizontal line which has a slope of 0.
A line perpendicular to it, a vertical line, has an undefined slope. A line parallel to it, also a horizontal line, has a slope of 0.

Learn this, it helps..
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2 years ago

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Find the negative reciprocal of the slope of the original line and use the point-slope formula.

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2 years ago

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Answer: The answer is 3x+1.

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1 year ago

What value of z makes the equation true? 7/8=z/32 Answers: A. 7 B. 8 C. 14 D. 28

vodka [1.7K]

7/8 of 32 is 28. Z is therefore d.) 28

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2 years ago

Read 2 more answers