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Allisa [31]
3 years ago
9

What should be the first step in adding these equations to eliminate y? 12x-2y=-1 + 4x+6y=-4

Mathematics
2 answers:
Sphinxa [80]3 years ago
8 0

Answer:

Multiply the top equation by 3

Step-by-step explanation:

elena55 [62]3 years ago
4 0

Answer:

(A) Multiply the top equation by 3

Step-by-step explanation:

The given equations are:

12x-2y=-1                             (1)

and 4x+6y=-4                     (2)

Now, multiplying equation (1) by 3, we get

36x-6y=-3

Also, adding the above equation with equation (2), we get

36x-6y+4x+6y=-3+(-4)

⇒40x=-7

⇒x=-\frac{7}{40}

Thus, on multiplying the top equation by 3, we can eliminate y easily.

Hence, option (a) is correct.

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The top of the cylindrical can shown below has a diameter of 7 centimeters (cm).
Sidana [21]

Answer:

Circumference of the can is 21.98 cm.

Step-by-step explanation:

Since, top of the cylinder can shown in the figure is in the shape of a circle

Circumference of a circle is given by the formula,

Circumference 'C' = π × Diameter

Where r = radius of the circle

Therefore, circumference of a circle with diameter 7 centimeters will be,

C = 7π

   = 7 × 3.14

   = 21.98 cm

Therefore, circumference of the can is 21.98 cm.

5 0
3 years ago
Prove the Pythagorean Theorem using similar triangles. The Pythagorean Theorem states that in a right triangle, the sum of the s
aivan3 [116]
For the answer to the question above asking to p<span>rove the Pythagorean Theorem using similar triangles. The Pythagorean Theorem states that in a right triangle, 
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</span>⇒ α² + β² = c² 
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"</span>In any right triangle ( 90° angle) <span>, the sum of the squared lengths of the two legs is equal to the squared length of the hypotenuse."
</span>
For example:  Find the length of the hypotenuse of a right triangle if the lengths of the other two sides are 3 inches and 4 inches.  
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8 0
3 years ago
Can someone help please
Elis [28]

Answer:

Alternate

Step-by-step explanation:

Because, as you can see, it is alternating

4 0
3 years ago
You want to have $25,000 for a down payment on a house 6 years from now. if you can earn 6.5 percent, compounded annually, on yo
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Use compound interest formula:
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so
25000=P(1.065)^6
=>
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6 0
3 years ago
No links, ty &lt;3
levacccp [35]

Answer:

sAy yOu aRe mY bAkA

Step-by-step explanation:

ty for the points <3

4 0
3 years ago
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