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3 years ago

2y + x + 7 = 0 how do i solve with substitution?

Mathematics

2 answers:

Jlenok [28]3 years ago

6 0

Answer:

x+2y=-7

Step-by-step explanation:

2y + x =-7

x+2y=-7

Vlada [557]3 years ago

3 0

When solving for x, set y to 0. When solving for y, set x to zero. You can just isolate the variables from there.

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James walked 548 yards. How many miles has he walked ? A. 337/440 miles B. 33/44 miles C. 1/4 miles D. 337/460 miles

blondinia [14]

548yds(3ft/yd)(mi/5280ft)=137/440 miles

You have a typo in your answers or maybe there is an E. none of the above :)

6 0

3 years ago

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In 5 minutes a conveyor belt moves 300 pounds of receyclable aluminum from the delievery truck a smaller belt moves the same qua

ladessa [460]

Answer:

It will take 3.214 minutes.

Step-by-step explanation:

It is given that, the conveyor belt transports 300 cans in 5 mins and the smaller belt transports 300 cans in 9 minutes.

Thus , the speed of conveyor belt is,

= $\frac{300}{5} = 60 cans per minute$

and of smaller belt is,

= $\frac{300}{9} = \frac{100}{3} cans per minute$

Thus, when both are used together,

conveyor belt will transport (60)(t) cans and smaller belt will transport $( \frac{100}{3})$ (t) cans per minute.

Thus the equation becomes,

$300 = (60)(t) + (\frac{100}{3})(t) = (\frac{280}{3})(t)$

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3 0

3 years ago

Please help me. I suck at math

serg [7]

Answer:

Answer is ...Obtuse

Step-by-step explanation:

$\frac{m$

$\frac{5x + 4}{2} = \frac{3}{2} x + 21$

$\frac{5x + 4}{2} = \frac{3x + 42}{2}$

$5x + 4 = 3x + 42$

$5x - 3x = 42 - 4$

$2x = 38$

$x = 19$

$substituting \: x = 19 \: \:in \: \: \: \: \: \: \: \\ m$

We get,

m<ABC =

$(5 \times 19) + 4 = 99$

Hence <ABC is obtuse

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3 years ago

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lawyer [7]

Answer:

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Step-by-step explanation:

y=mx+b

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3 years ago

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To obtain information on the corrosion-resistance properties of a certain type of steel conduit, 45 specimens are buried in soil

Fiesta28 [93]

Answer:

The sample has not met the required specification.

Step-by-step explanation:

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$H_a$ : The true average penetration is > 50 mils

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