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4vir4ik [10]
2 years ago
10

RSM HW HELP!!! PLEASE HELP ME ASAP!!!! I WILL GIVE BRAINLIEST IF YOU SOLVE THEM ALL CORRECTLY!!! THANKS!

Mathematics
2 answers:
cluponka [151]2 years ago
8 0

b)

|2x−3y| if x=0.5; y=−0.7

Substitute: |2(0.5)-3(-0.7)|

Simplify: |1+2.1|

Simplify: |3.1|

Since it is an absolute value, it will always be positive: 3.1

d)

|−3 |x| +2x−1| if x=−5

Substitute: |-3(|-5|)+2(-5)-1|

Absolute value is positive: |-3(5)+5(-5)-1|

Simplify: |-15-25-1|

Simplify: |-41|

Absolute value always positive: 41

Lena [83]2 years ago
5 0

<em><u>Answer for the first question:</u></em>

<em><u></u></em>a)3a+5b~,when~a=-2;b=-1<em><u></u></em>

<em><u></u></em>=(3)(-2)+(5)(-1)<em><u></u></em>

<em><u></u></em>=-11<em><u></u></em>

<em><u></u></em>

<em><u>Answer for the second question:</u></em>

<em><u></u></em>b)2x-3y~,when~x=0.5;y=-0.7<em><u></u></em>

=(2)(0.5)-(3)(-0.7)

=3.1

<em><u>Answer for the third question:</u></em>

<em><u /></em>c)4a+8-a,~when~a=-2<em><u /></em>

<em><u /></em>=(4)(-2)+8-(-2)<em><u /></em>

<em><u /></em>=2<em><u /></em>

<em><u /></em>

<em><u>Answer for the fourth question:</u></em>

<em><u /></em>d)-3x+2x-1,~when~x=-5<em><u /></em>

<em><u /></em>=(-3)(-5)+(2)(-5)-1<em><u /></em>

<em><u /></em>=4<em><u /></em>

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therefore, since they give us the window's area: 6525 cm^2, and also the window's length: 87 cm, we just need to replace those values in the area formula and solve for the unknown "width". We do such by dividing both sides of the equation by 87 cm in order to isolate the unknown on one side of the equal sign;

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