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Ghella [55]
3 years ago
8

Solve the equation: 1/2x^2 + x when x = 4

Mathematics
1 answer:
lesya [120]3 years ago
5 0

Answer:

12

Step-by-step explanation:

1/2(x^2 + x)        x=4

1/2(4^2+4)

1/2(16+4)

1/2 x 20

10


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This is really hard for me can someone please help<br> This gives me a headache trying to do it
Papessa [141]
1. 3x-5<19 
    3x-5+5<19+5
    3x<24
    3x/3<24/3
    x<8

2. -2x+12<-4
    -2x+12-12<-4-12
    -2x<-16
    -2x/-2>-16/-2
       x>8

3. Because the numbers are positive when divided.

4. The inequality sign is reversed because the 2nd to last step is divided by by a negative number. (This is also the same for multiplication)
 
5. -7d+8>29
    -7d+8-8>29-8
    -7d/7>21/-7
       d>-3

6.12-3b<9
   12-12-3b<9-12
    -3b/-3>-3/-3
        b>1

7.z/7-6=>-5
   z/7-6+6=>-5+6
   z/7*7=>1*7
       z=>7                                      (what grade are you in?!)
8 0
3 years ago
Please answer!!!!!!!!!!!!!!!!!
laiz [17]
The answer is B, the green is f(x)=x^2 and the red one is g(x)=f(2x).

4 0
2 years ago
Nolan rides his bike 63 miles in 270 minutes. What is his average speed in miles per hour?
s2008m [1.1K]
63 miles in 270 minutes will mean that nolan rides his bike at a distance of 63/270 miles in one minute.
there are 60 minutes in an hour. So to find out the distance he covers in 1 hour, 63/270 × 60 will give you 14 miles.
Since the question is asking for the average speed, nolan rides his bike at 14 miles per hour i think.
4 0
3 years ago
1 kilogram
vlabodo [156]

Answer:

True

Step-by-step explanation:

For every kilogram, there are 1000 grams

3 0
3 years ago
How can you add the fractions 3/10 and 2/5? Explain
Vinvika [58]
3/10+ 2/5
= 3/10+ 4/10 (common denominator is 10)
= 7/10

The final answer is 7/10~


5 0
3 years ago
Read 2 more answers
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