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Marina CMI [18]
4 years ago
15

[2x+4] -[-x+5 ]subtract linear expressions

Mathematics
1 answer:
Olin [163]4 years ago
6 0

(2x +4 ) - (x+5)

when we open the brackets the sign (-) will change to (+) so,

2x+4 - x-5

x+4-5

x-1

<h3><u>Hope </u><u>this </u><u>helps </u><u>you </u><u>mate </u></h3>

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How many pounds are in<br> 8 kilograms? 1 kg = 2.2 lbs<br><br> 8 kg = [?] lbs
ElenaW [278]

Answer:

17.6 lbs

Step-by-step explanation:

1kg=2.2lbs

Multiply each side by 8

8kg=17.6 lbs

5 0
3 years ago
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15z-7=14z+12 What does Z equal​
Anika [276]

Answer:

19

Step-by-step explanation:

15z-14z=12+7

z=19

8 0
3 years ago
Is this correct? pLeAsE lOoK aT tHe ImAgE bElOw!!! Have a great day!
Scrat [10]
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3 0
3 years ago
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I need this problem solved real quick
PIT_PIT [208]

<u>Let's take this problem step-by-step</u>:

<u>The ;unlabeled angle' adjacent to the 'outside angle of measure 78°'</u>

  ⇒ is on a straight line

     ⇒ sum of angle measure = 180 degrees

       unlabeled_.angle+78 = 180\\unlabeled_.angle = 102

<u>Now we know:</u>

 ⇒ sum of all angles in a triangle ⇒ 180°

<u>Let's put that in equation form and solve:</u>

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<u>Answer: 21°</u>

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8 0
2 years ago
One bar of candy A and two bars of candy B have 774 calories. Two bars of candy A and one bar of candy B contains 786 calories.
vampirchik [111]
◆ Define the variables:

Let the calorie content of Candy A = a
and the calorie content of Candy B = b

◆ Form the equations:

One bar of candy A and two bars of candy B have 774 calories. Thus:

a + 2b = 774

Two bars of candy A and one bar of candy B contains 786 calories

2a + b = 786

◆ Solve the equations:

From first equation,
a + 2b = 774
=> a = 774 - 2b

Put a in second equation
2×(774-2b) + b = 786
=> 2×774 - 2×2b + b = 786
=> 1548 - 4b + b = 786
=> -3b = 786 - 1548
=> -3b = -762
=> b = -762/(-3) = 254 calorie

◆ Find caloric content:

Caloric content of candy B = 254 calorie

Caloric content of candy A = a = 774 - 2b = 774 - 2×254 = 774 - 508 = 266 calorie
5 0
3 years ago
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