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slava [35]
3 years ago
10

The results of a survey are shown below.in the survey,12 students said that they would like to learn French.

Mathematics
1 answer:
dalvyx [7]3 years ago
6 0
I think 12 people would like to learn french 
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-13x=90-2y <br> -6x=48-2y
Kisachek [45]

While it's pretty obvious to most of us that


-13x=90-2y

-6x=48-2y


is a system of linear equations, it'd be well to include that info plus the instructions "solve this system of linear equations."


Subtract the 2nd equation from the first:


-13x=90-2y

+6x=-48+2y

-----------------------

-7x = 42. Then x = -42/7, or x = 6.


Now subst. 6 for x in either one of the given equations. Suppose we use the 2nd equation:


-6x=48-2y


Then -6(6)=48-2y, or -36 = 48 - 2y, or 2y = 48+ 36 = 84. Then y = 42.


The solution is (6, 42).

3 0
3 years ago
Given the vectors u = &lt;5,-1&gt; and v = &lt;1,12&gt;, find -7u-3v. *
zepelin [54]

You multiply vectors and scalar simply by multiplying each component by that scalar:

-7u = \langle-35,7\rangle,\quad -3v=\langle -3,-36\rangle

Finally, you sum two vectors by summing the correspondent coordinates:

-7u-3v = \langle-35,7\rangle+\langle -3,-36\rangle = \langle-38,-29\rangle

4 0
3 years ago
if the probability of picking a green marble from a bag of green and red marbles is 0.3. if i choose a marble 100 times and repl
vfiekz [6]

Answer:

30 marbles would be green

Step-by-step explanation:

green chance is 0.3

red chance 0.7

.3 times 100

30 green marbles is what you would expect

7 0
3 years ago
Heyyy!! Can someone please help me out?
exis [7]

Answer: yellow box

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
find the area of the figure. all angles in the figure are right angles. please check this answer asap! thank you so much! ​
MissTica

Answer:

57

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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