Use benchmarks to estimate the sum, difference, or product. (I NEED THIS ANSWERED SUPER FAST ITS WORTH 30 POINTS)

Mathematics

2 answers:

vlada-n [284]3 years ago

7 0

1.1 71/72
2.5 17/70
3.35 41/51
There you go hope it helps

Oliga [24]3 years ago

5 0

Answer: I am on this question right now, what were the answers please?

Step-by-step explanation:

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Convert 208 in base 10 to binary number

Ostrovityanka [42]

Step-by-step explanation:

208

= 128 + 64 + 16

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= 11010000. (base 2)

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3 years ago

What percent of 50 is 9?

d1i1m1o1n [39]

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2 years ago

Whats 3(x+4) In simplyed.

Setler [38]

Answer:

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Step-by-step explanation:

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3 years ago

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vladimir2022 [97]

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Step-by-step explanation:

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3 years ago

X-y+z=-4 3x+2y-z=5 -2x+3y-z=15 How do I solve this?

Lera25 [3.4K]

$1)\ \ \ x-y+z=-4\ \ \ \Rightarrow\ \ \ z=-4-x+y\\\\2)\ \ \ 3x+2y-z=5 \\.\ \ \ \ \Rightarrow\ \ 3x+2y-(-4-x+y)=5 \\.\ \ \ \ \Rightarrow\ \ 3x+2y+4+x-y=5 \\.\ \ \ \ \Rightarrow\ \ 4x+y=1\\\\3)\ \ \ -2x+3y-z=15\\.\ \ \ \ \Rightarrow\ \ -2x+3y-(-4-x+y)=15\\.\ \ \ \ \Rightarrow\ \ -2x+3y+4+x-y=15\\.\ \ \ \ \Rightarrow\ \ -x+2y=11\\--------------------\\$

$z=-4-x+y\\.\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ and\\ \left \{ {{4x+y=1\ \ \ \ } \atop {-x+2y=11\ /\cdot4}} \right. \\\\\left \{ {{4x+y=1\ \ \ \ } \atop {-4x+8y=44}} \right. \\-------\\y+8y=1+44\\9y=45\ /:9\\y=5\\\\-x+2y=11\ \ \ \Rightarrow\ \ \ x=2y-11\ \ \ \Rightarrow\ \ \ x=2\cdot5-11=-1\\\\z=-4-x+y=-4-(-1)+5=-4+1+5=2\\\\Ans.\ x=-1\ \ \ and\ \ \ y=5\ \ \ and\ \ \ z=2$

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3 years ago