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3 years ago

Twice the sum of x and y decreased by 21

1 answer:

8 0

Answer: 2((x+y)-21)

Calculation/Explanation:

Twice the sum of x and y decreased by 21 means that you must add x and y first before decreasing by 21. The last step is to double the whole equation that we just performed.

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168_138_123_ _ _ _ _ _ me ayudan por favor?✅

Mazyrski [523]

paso a paso

Step-by-step explanation:

tienes que saber cuanto le quito al otro por que

el primero es 168 y el otro es 138 cubro le quito 30 y el otro

es 123 igual tienes que quitarle tal ves es sumarle primero y después 2 de restarle

espero que te sirva

5 0

2 years ago

1/4 plus 4/5(3/4x - 1 1/9)

ANTONII [103]

Answer:

$\frac{3}{5}x+-\frac{131}{180}$

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3 years ago

Write fifty two and 40 hundredths in the standard form decimal

Mashutka [201]

Answer:

52.4

Step-by-step explanation:

40 hundredths as a decimal is 40/100 which is .40.

The "fifty two" is a whole number which is in front of the ".40" which makes 52.4 or 52.40.

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3 years ago

What is the area of the model on the right?

mestny [16]

I could be wrong, but I think it could be D, 18.5.

3 0

3 years ago

Solve the system

Alexxandr [17]

Answer:

x = $\frac{2u+v}{7}$

y = $\frac{2v - 3u }{7}$

Jacobian value = 1/7

Step-by-step explanation:

Given data:

u = 2x -y

v = 3x + 2y

solving the system for x and y in terms of u and v

x = $\frac{2u+v}{7}$

y = $\frac{2v - 3u }{7}$

The value of the Jacobian = 1/7 ( solution attached below )

Image under the transformation of the triangular region with vertices ( 0,0) , (2,4) and (2,-3) in the x-y plane is attached below

5 0

3 years ago