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DerKrebs [107]
3 years ago
7

Which expression has an equivalent value to x^2 + 9x + 8 for all values of x?

Mathematics
1 answer:
Svetllana [295]3 years ago
6 0
The first choice is correct. 1 times 8 is 8, and 1+8 is 9
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Mrs. Hinojosa head 75 ft of ribbon if each of the 18 students in her class gets an equal length of ribbon how long would each pi
Helen [10]

Answer:

4 1/6 ft

Step-by-step explanation:

Since each of the 18 students gets an equal length of ribbon, we need to divide the 75 ft of ribbon into 18 equal parts.

75/18= 4 1/6

Each student gets 4 1/6 ft of ribbon

4 0
3 years ago
the mean of 10 numbers is 1445. if 1500 is also added to this data what will be there new mean of 11 numbers
tamaranim1 [39]
Let the sum of the 10 numbers be x, then
x/ 10 = 1445
x = 1445 x 10 = 14450

New mean = (14450 + 1500)/11 = 15950/11 = 1450
7 0
3 years ago
Find the difference.<br> -99 - 1 = [?]
soldier1979 [14.2K]
The difference is -100
8 0
2 years ago
An airplane descends during the last hour of it's flight to prepare for landing. It's altitude changes at an average of -0.15 km
Natalija [7]

Answer:

-.15 km/ minute * 60 minutes

-9 km

Step-by-step explanation:

The rate is -.15 km per minute

We have 60 minutes

distance = rate  times time

change in elevation is the same as the distance change

change in elevation = -.15 km/ minute * 60

   change in elevation =-9 km

8 0
3 years ago
Read 2 more answers
Vector a = 3i + mj, vector b = 2i - nj and vector c = ni + 8j. If a and b is perpendicular to each other and b and c are paralle
Tatiana [17]

May be you know it or not a two dimensional vector can be represented by a complex number.Why i have written this statement you will just know when you will see its solution

a = 3i + mj and  b = 2i - nj are perpendicular to each other ,so their dot product

will be zero.

i.e a.b = 0\\(3i + mj) .(2i - nj)=0\\6-mn=0\\mn=6j

vector b = 2i - nj and vector c = ni + 8j are parallel to each other.2i - nj = k (ni + 8j)2/n = -n/8n^{2} =-16n=4ij

mn = 6

so m=6/4i

m=3/2i

m=3i^{4}/2i

m = 3i^{3}/2

m= -3i/2 as(i^{4} =1, i^{3} = -i[/tex][/tex]

8 0
3 years ago
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