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notsponge [240]
3 years ago
7

Evaluate the expression 3x +(z+2y)-12 if x=3,y=8 and z=5

Mathematics
1 answer:
joja [24]3 years ago
5 0

Answer:

18

Step-by-step explanation:

First you need to plug in the numbers for each variable.

3(3)+(5+2(8))-12

Now you solve

3(3)+(21)-12

9+21-12

18

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Solve for x: 1/2 (10x+6)=-2x+10
pickupchik [31]

Answer: x = 1

Step-by-step explanation:

substitute 1 for x

1/2(10(1)+6) = -2(1)+10

1/2(10+6) = -2+10

5+3 = -2+10

8=8

8 0
2 years ago
Help please answer really quick. I really need help. ( Math )
EleoNora [17]

Answer:

0.25 lbs

<h3>Explanation </h3>

You can translate the 1/2 a pound into 0.5lbs, which is equivalent. Then, this is the easier part. Sarah divides the clay into <u>t</u><u>w</u><u>o</u> equal pieces. This is asking you to halve 0.5lbs. The answer being 0.25lbs

5 0
3 years ago
Two​ cars, 540 kilometers​ apart, begin driving toward each other on a​ long, straight highway. one car travels 75 kilometers pe
Elodia [21]

One car travels at a speed of 75 kilometers per hour and the other car travels at a speed of 105 kilometers per hour.

Since both the cars are travelling towards each other their combined speed will be: 75+105=180 km/h.

Now, since the distance between the cars to start with is 540 km. Therefore, the time taken before the cars collide is:

t=\frac{540}{180} =3 hours.

Now, the speed of the canary is 100 km/h.

Therefore, the Canary flies flies for (100 km/h)x(3 hours) = 300 km before the cars collide.


5 0
3 years ago
24 less than 4 times a number is 60. what is the number?
kondaur [170]
Hey there! :D

Make an algebraic expression. 

Let the 'number' equal x. 

4x-24= 60

Add 24 on both sides. 

4x= 84

Divide both sides by 4. 

x=21

The number is 21. 

I hope this helps!
~kaikers 
8 0
3 years ago
Whats -3/1 simplified?
wolverine [178]

Answer:

-3

Step-by-step explanation:

You cannot simplify this question anymore, for it is already a whole number.  

Steps:

-3/1

Eliminate the fraction bar and one...

-3

(Anything over one, is whole...so if I were to put 98384743/1, it would just be 98384743.)

3 0
2 years ago
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