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Alona [7]
3 years ago
12

3x - 5y = 17 y = -7 Solve by substitution.

Mathematics
1 answer:
Vesnalui [34]3 years ago
5 0
Substitute the value of y given by the second equation into the first.
.. 3x -5(-7) = 17
.. 3x +35 = 17
.. 3x = -18
.. x = -6

The solution is (x, y) = (-6, -7).

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Please help me, its due today!!!
zlopas [31]

Answer:

7

Step-by-step explanation:

So we have the expression:

|3x-1|

And we want to evaluate it for x=-2.

So, substitute -2 for x:

|3(-2)-1|

Multiply:

=|-6-1|

Subtract:

=|-7|

The absolute value of a negative is positive. So:

=7

And we're done!

8 0
3 years ago
1 QUESTION. PLEASE HELP. VOLUME GEOMETRY QUESTION.
mina [271]
Knowing the volume of a 3-D shape is extremely when deciding what materials to use and how much of them to use.  When you know the volume of the different designs is helpful when deciding which material costs less to use but still meets requirements. For example, if you were trying to decide what material to fill your product with, and say the volume of your product is 36^3. You narrow things down to two products, one costing $54 to fill the entire thing. The other costing $60. Because you have the volume, it will be easy to decide which is better based off of the price per square inch. If you didn't have the volume. You would have to make an estimate and potentially make a bad business decision.   

Hope this helps! I apologize for my long response
3 0
3 years ago
Hal has a steel barrel with a diameter of 6 feet that can be filled to a depth of 4.6 feet with oil. What is the volume of the b
scoray [572]

Answer:

129.996 cubic feet

Step-by-step explanation:

Assuming that the barrel is a perfect cylinder, we can use the formula to find the volume:

\pi(r)^2(h)

First, we have to find the radius, which is:

D = 2r

So the radius is 3 feet, since it is half of the diameter. Then, we plug in the values.

3.14(3)^2(4.6)

Now, we solve. Exponents are first...

3.14(9)(4.6)

Now multiply left to right.

28.26(4.6)

129.996 cubic feet

Therefore, the barrel can hold 129.996 cubic feet of oil. Hope this helps you!

3 0
3 years ago
Please help me! Please don't get it wrong ;-;
polet [3.4K]

Answer:

Its 40 degrees

Step-by-step explanation:

60+80=140

180-140=40   (a straight line is always 180 degrees)

Hope it helped

3 0
3 years ago
An acute angle can have all of the following measures except 89 45 10 0
Naddik [55]
0 is the only degree that cannot work
3 0
3 years ago
Read 2 more answers
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