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sergeinik [125]
3 years ago
9

Can someone plz help :( I need help asap

Mathematics
2 answers:
erastovalidia [21]3 years ago
8 0

Answer:

x=120, y=160. and is that u in ur pfp

Step-by-step explanation:

sleet_krkn [62]3 years ago
5 0

Answer:

x = 120, y = 160

Step-by-step explanation:

I like to use the elimination strategy in this type of problem.

You need to get one of the terms on the right side of the equation equal to and opposite another term on the right side of the other equation. For example, I'm going to make the y term of the first equation equal and opposite the y term of the second equation by multiplying the entire first equation by -1.5.

-1.5 * (x + y) = (280) * -1.5

2.5x + 1.5y = 540

The new equations are (only the first one changed):

-1.5x - 1.5y = -420

2.5x + 1.5y = 540

-----------------------------------

x = 120

Then plug this back into one of the equations.

(120) + y = 280

y = 160

You can check by plugging these into the other equation to make sure they are correct.

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a closed circular water tank in a subdivision is made up of concreate aluminum. its outer diameter is 8.4 m and its height is 12
m_a_m_a [10]

Answer:

122.7792 sq. m

Step-by-step explanation:

diameter= 8.4 m

therefore, radius = r = 4.2 m.......( as radius is 1/2 of diameter)

height = h= 12 m

only the exterior is to painted so the total surface area of the cylinder is taken,

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3 years ago
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Answer:

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2 years ago
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Maksim231197 [3]


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Prove that if a quadrilateral has four equal sides and one right angle, then the quadrilateral is a square
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Marco wants to take a taxi cab ride if the cost to ride is 7.00 with the cost per m is 0.25 per mile and mr. o can only spend 30
77julia77 [94]

Each ride has a fixed cost of 7 and a cost that increases proportionally to the distance travelled of 0.25 per mile. Therefore the total cost of the ride is:

\text{ cost(x)}=0.25\cdot x+7

Where "x" is the distance in miles. Marco can only spend 30 on his ride, therefore the cost must be less or equal to that value.

\begin{gathered} \text{ cost(x)}\leq30 \\ 0.25\cdot x+7\leq30 \end{gathered}

We can solve the linear equation by isolating the "x" variable on the left side.

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Marco's travel must be shorter or equal to 92 miles.

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