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Kipish [7]
3 years ago
11

given the equations 9x + (3)/(4)y + 6 and 2x + (1)/(2)y=9 by what factor would you multiply the sencond equation to eliminate y

and solve the system through linear combinations
Mathematics
1 answer:
Paul [167]3 years ago
4 0

Answer:

  -3/2

Step-by-step explanation:

If the first equation is 9x +3/4y = 6, then the solution would look like this:

  \left(9x+\dfrac{3}{4}y\right)-\dfrac{3}{2}\left(2x+\dfrac{1}{2}y\right)=(6)-\dfrac{3}{2}(9)\\\\6x=-\dfrac{15}{2}\\\\x=-\dfrac{15}{12}=-\dfrac{5}{4}\\\\2\left(-\dfrac{5}{4}\right)+\dfrac{1}{2}y=9\ \longrightarrow\ y=2\left(9+\dfrac{5}{2}\right)=23

An appropriate multiplier is -3/2.

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3 years ago
Which of the following are remote interior angles of _1? Check all that apply.
andrew11 [14]

Answer:

I would say 2,3,4.

Step-by-step explanation:

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8 0
3 years ago
Find the Surface area AND Volume of the figure. Round to the nearest hundredths.
qwelly [4]

Answer:

SA= 902.88 yd²

V = 1386.24 yd³

Step-by-step explanation:

Surface area

Since the bases are right triangles, you need to find the base of the triangle. Use Pythagorean theorem as you are given the hypotenuse and one leg.

19² = 15.2² + b²

361 = 231.04 + b²

Subtract 231.04 from both sides

b² = 129.96

Root that

b = 11.4

Now that you have the base, find the areas of the triangles and rectangles.

<em>Triangles</em> - (15.2*11.4)1/2 (2)

15.2*11.4 = 173.28

<em>Rectangles </em>- (15.2)(16) = 243.2

(16)(11.4) = 182.4

(16)(19) = 304

Add them all together and the SA equals 902.88 yd²

Volume

V = Bh

V = 1/2(15.2)(11.4)(16)

V = 1/2 (2772.48)

V = 1386.24 yd³

4 0
2 years ago
What is 12(18)&gt;8+34-98=
Law Incorporation [45]

Answer:

12*18?8+34-98

216>-56

TRUE

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
1-4y^2 in factored form
Anastasy [175]

Answer:

(1 -2y)(1 +2y)

Step-by-step explanation:

The difference of squares is factored as ...

... a² - b² = (a -b)(a +b) . . . . . . . . a form you should keep handy

Here, you have a=1, b=2y, so your factored form is ...

... 1 -4y² = (1 -2y)(1 +2y)

8 0
3 years ago
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