Question

Найдите значение выражения, предварительно упростив его: a) 1/4(-8+2b)-(-4+6b), если b=-4/11 б) 14(0.6x-6/7y)-1/8(16.8у), если х= 5/9. у=10. ПОМОГИТЕ РЕШИТЬ ПОЖАЛУЙСТА, ОЧЕНЬ СРОЧНО НАДО!!!!!!!!!!!!!!!

Answer 1

-2+в/2+4-6в=2-5 1/2в=2-11/2*(-4/11)=2+2=4
8.4х-12у-84/40у=8.4х-14.1у=42/5*5/9-14.1*10=42/9-141=-136(3)

Answer 2

Simplifying Expression a)

To simplify the expression a) 1/4(-8+2b)-(-4+6b) when b = -4/11, we substitute the value of b into the expression and simplify.

1/4(-8+2b)-(-4+6b) = 1/4(-8+2(-4/11))-(-4+6(-4/11))

To simplify further, we need to perform the operations inside the parentheses first.

1/4(-8+2(-4/11))-(-4+6(-4/11)) = 1/4(-8-8/11)-(-4-24/11)

Next, we simplify the expressions inside the parentheses.

1/4(-8-8/11)-(-4-24/11) = 1/4(-88/11-8/11)-(-44/11-24/11)

Now, we can combine the fractions.

1/4(-88/11-8/11)-(-44/11-24/11) = 1/4(-96/11)-(-68/11)

To subtract a negative number, we can change it to addition.

1/4(-96/11)-(-68/11) = 1/4(-96/11)+(68/11)

Now, we can combine the fractions again.

1/4(-96/11)+(68/11) = -96/44+68/11

To add or subtract fractions, we need a common denominator. The common denominator here is 44.

-96/44+68/11 = -216/44+68/11

Now, we can add the fractions.

-216/44+68/11 = -216/44+272/44

Finally, we can simplify the expression.

-216/44+272/44 = 56/44

Therefore, the simplified expression a) 1/4(-8+2b)-(-4+6b) when b = -4/11 is 56/44.

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