3 years ago

2x+y+4z=16 5x-2y+2z=-1 X+2y-3z=-9

Mathematics

1 answer:

LekaFEV [45]3 years ago

6 0

Answer:

Step-by-step explanation:

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Verdich [7]

Answer:

2²4

4²=16

4+16=20

hope it helps :)

8 0

3 years ago

"Bert has half as much money as Ernie. If Ernie loses $225 and Bert earns $675, Bert will have twice as much money as Ernie. How

Rzqust [24]

Answer: Ernie has $750 and Bert has $\dfrac{750}{2}=\$375$

Step-by-step explanation:

Let the amount that Ernie has be 'x'.

Let the amount that Bert has be $\dfrac{x}{2}$

Amount lost by Ernie = $225

Amount gained by Bert = $675

According to question, we get that

$2(x-225)=\dfrac{x}{2}+675\\\\2x-450=\dfrac{x}{2}+675\\\\2x-\dfrac{x}{2}=675+450\\\\\dfrac{4x-x}{2}=1125\\\\\dfrac{3x}{2}=1125\\\\x=\dfrac{1125\times 2}{3}\\\\x=\$750$

Hence, Ernie has $750 and Bert has $\dfrac{750}{2}=\$375$

3 0

3 years ago

Somebody plz help!!!!!!!!!!!!!

Setler79 [48]

48 is the answer you will get

3 0

3 years ago

Read 2 more answers

X-3\5=10<br> Need this ASAP thanks

tiny-mole [99]

Answer:

exact: X=53/5

decimal: X=10.6

mixed number form: X= 10 3/5

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

7n + 6(n+4) -15 <br><br> how do i solve this with a step by step example

GrogVix [38]

Answer:

13n +9

Step-by-step explanation:

There is nothing to solve. We can simplify the expression by eliminating parentheses and combining like terms.

7n +6(n +4) -15 . . . . . . given

7n +6n +6(4) -15 . . . . use the distributive property

(7 +6)n +(24 -15) . . . .identify and group like terms

13n +9 . . . . . . . . . . combine like terms

8 0

2 years ago