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alex41 [277]
2 years ago
11

1. Mateo plans to solve the system below using elimination. Which is a reasonable first step Mateo could take? -X + 6y=9 3x + 2y

= 13 - A. Multiply the 2nd equation by 3 - B. Multiply the 2nd equation by -3 C. Multiply the 1st equation by - 3 D. Any of the above​
Mathematics
1 answer:
kap26 [50]2 years ago
5 0

Answer:

C

Step-by-step explanation:

multiply the 1st equation by -3

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Which answer is equivalent to<br> ??? Help please
grigory [225]

Answer:

\large\boxed{\dfrac{36}{25}}

Step-by-step explanation:

\text{Use}\ a^{-n}=\dfrac{1}{a^n}\\\\\dfrac{5^{-2}\cdot9}{2^4\cdot4^{-3}}=(5^{-2}\cdot9):(2^4\cdot4^{-3})=\left(\dfrac{1}{5^2}\cdot9\right):\left(2^4\cdot(2^2)^{-3}\right)\\\\\text{use}\ (a^n)^m=a^{nm}\\\\=\left(\dfrac{1}{25}\cdot9\right):(2^4\cdot2^{-6})\\\\\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=\dfrac{9}{25}:2^{4+(-6)}=\dfrac{9}{25}:2^{-2}=\dfrac{9}{25}:\dfrac{1}{2^2}=\dfrac{9}{25}:\dfrac{1}{4}=\dfrac{9}{25}\cdot\dfrac{4}{1}=\dfrac{36}{25}

7 0
3 years ago
Can someone find the length of the spine plss
morpeh [17]

Answer:

48.2 cm

Step-by-step explanation:

The bottom side of the large triangle has length 78 cm.

The bottom side of the right triangle has length 78 cm/2 = 39 cm.

Now we use the Pythagorean theorem to find the vertical side, the spine.

39² + s² = 62²

s² = 3844 - 1521

s² = 2323

s = 48.2

Answer: 48.2 cm

3 0
2 years ago
What are the solutions to the following system?
Dima020 [189]
The answer is
2x+(3x+4)=6
4 0
1 year ago
What is 315 times 30
tia_tia [17]
9,450
hope I helped....
4 0
3 years ago
Read 2 more answers
Solve the equation 4+3(x+2)=-8 <br> A) -6 <br> B) 6 <br> C) -2/3<br> D) 2/3
natulia [17]
4+3(x+2)=-8
4+3x+6=-8
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-10 -10
3x= -18
X= -6
8 0
3 years ago
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