If x=3, calculate the value of: X squared + 2x

Mathematics

2 answers:

vlada-n [284]3 years ago

5 0

$x^2+2x\\\\\text{If x = 3,}\\\\3^2 + 2(3) = 9 + 6 = 15$

docker41 [41]3 years ago

5 0

Answer:

As we are told that the value of x is equal to 3, we are able to substitute this into our equation, so it becomes 2(3)^2. We then use the rules of BIDMAS, so we must square the number 3 first (meaning we multiply the number by itself), and then multiply it by two. 3^2 is 9, and 9 times 2 = 18. Therefore, the answer is 18.

You might be interested in

Amelia has

Anastaziya [24]

Answer:

Amelia is 264 inches

Step-by-step explanation:

do 22 ×12 because at birth she was 22 inches and now she is 12 months.

8 0

3 years ago

A technician is launching fireworks near the event of a show. Of the remaining 11 fireworks, 4 are blue and 7 are red. If she la

SpyIntel [72]

$\displaystyle |\Omega|=\binom{11}{6}=\dfrac{11!}{6!5!}=\dfrac{7\cdot8\cdot9\cdot10\cdot11}{2\cdot3\cdot4\cdot5}=462\\ |A|=\binom{4}{2}=\dfrac{4!}{2!2!}=\dfrac{3\cdot4}{2}=6\\\\ P(A)=\dfrac{6}{462}=\dfrac{1}{77}\approx1\%$

8 0

4 years ago

To be considered for pilot school, 12 students took a spatial reasoning test that resulted in this list of scores. find the perc

Brums [2.3K]

<span>a. 17th percentile First, take the data and sort it in increasing order, getting: 98 101 117 121 122 127 130 137 138 143 145 152. The score of 117 is greater than 2 of the scores out of a total of 12 scores. So the percentile rank is 2/12 = 0.1666667 = 16.66667, or the 17th percentile. Therefore the answer is "a. 17th percentile"</span>

7 0

3 years ago

What is the rational number of 1/8 and 1/4

Lapatulllka [165]

<span>1/8 , ...... , 1/4

1/8 = 2/16
1/4 = 4/16

2/16 , 3/16 , 4/16

I hope I helped please leave thanks

</span>

5 0

3 years ago

When you mix two colors of paint in equivalent ratios, the resulting color is always the same. Complete the table as you answer

Yuliya22 [10]

Answer:

1. 5 cups of yellow paint.

2. 15 cups of yellow paint to 3 cups of blue paint.

3. 1:5 is the proportional relationship.

4. 5 is the constant of proportionality, it represents the . of yellow cups of paint.

Step-by-step explanation:

sorry if 4 is wrong

8 0

3 years ago