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Anettt [7]
3 years ago
13

A survey was given to see if Tennesseans think the age for first learning how to drive should be moved. The survey was given to

middle school
mothers at a school assembly. One of the questions asks
"Should the age requirement for learning how to drive be changed or kept the same?
O a
Oь
О с
Od
This is based because the way the study was designed will lead to inaccurate conclusions
This is biased because the wording in the question isn't fair.
This is biased because middle school moms are a biased sample.
A and
Oe
All of the above
Mathematics
2 answers:
wolverine [178]3 years ago
5 0
It is all the above !!
Eva8 [605]3 years ago
4 0
It is all of the above
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Help meeeeeeeeeeeeeeeee
Radda [10]

Answer:

c

Step-by-step explanation:

there are 8 parts and 4 of them are red= 4/8

which simplifies to 1/2

7 0
2 years ago
What is 4+1 lets see how smart u sre
Sliva [168]

Answer:

its legit 5

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Show work and Factor 4x^2+xy-18y^2
grigory [225]

Answer:

4x^2+xy-18y^2=(4x+9y)\,(x-2y)

Step-by-step explanation:

Let's examine the following general product of two binomials with variables x and y in different terms:

(ax+by)\,(cx+dy)= ac\,x^2+adxy+bcxy+bdy^2

so we want the following to happen:

a\,c = 4\\ad+bc=1\\bd--18

Notice as well that ad+bc =1 means that those two products must differ in just one unit so, one of them has to be negative, or three of them negative. Given that the product bd=-18, then we can consider the case in which one of this  (b or d) is the negative factor. So let's then assume that a\,\,and \,\,c are positive.

We can then try combinations for  a\,\,and \,\,c  such as:

a = 4;\,\,c=1\\a=2;\,\,c=2\\a=1;\,\,c=4

Just by selecting the first one (a=4;\,\,c=1)

we get that 4d_b=1\\b=-4d-1

and since

bd=-18\\(-4d-1)\,d=-18\\-4d^2-d=-18\\4d^2+d-18=0

This quadratic equation give as one of its solutions the integer: d = -2, and consequently,

d=-18/(-2)\\d=9

Now we have a good combination of parameters to render the factoring form of the original trinomial:

a=4; \,\,b=9;\,\,c=1;\,\,d=-2

which makes our factorization:

(4x+9y)\,(x-2y)=4x^2+xy-18y^2

6 0
3 years ago
There is a bag filled with 4 blue and 5 red marbles.
kkurt [141]

Answer:

  • 5/9

Step-by-step explanation:

There are 4 blue, 5 red and total of 9 marbles.

<u>If two marbles are taken and we are looking for exactly one red, then it is:</u>

  • red, then blue or blue, then red

<u>Find the probability of each case:</u>

  • P(r, b) = 5/9*4/8 = 5/18
  • P(b, r) = 4/9*5/8 = 5/18

<u>Probability of exactly one red:</u>

  • P = 5/18*2 = 5/9
6 0
3 years ago
How do you write 77/20 in a decimal
Sveta_85 [38]
Writing it as a decimal would be 3.85 you just divide it
7 0
3 years ago
Read 2 more answers
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