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castortr0y [4]
3 years ago
12

Can someone please help me i don’t really understand these questions

Mathematics
1 answer:
Gemiola [76]3 years ago
8 0

7) 9

8) 4

9) 20

Trust me

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True or false, there is no solution to the systems of inequalities shown below
miss Akunina [59]
False 
Because if you plot a graph to both the equation as i have attached the image.. you can see there can be multiple solution to the above system of inequalities. 

8 0
3 years ago
Read 2 more answers
For what value of “a”are the graphs of 5y = -2x + 10 and 3y = aX- 15 parallel
Pie

Answer:

a = -6/5

Step-by-step explanation:

For the graphs to be parallel the graphs should have same slope(m)

So we rewrite both our equations in the slope-intercept form then compare the slope to find the value of a like this,

y=mx+b

This equation is the slope-intercept form we convert both our equations in this form firstly taking equation 1

5y=-2x+10\\\\y=\frac{-2x+10}{5} \\\\y=\frac{-2}{5}x+\frac{10}{5} \\\\y=\frac{-2}{5}x+2

so if we compare it with y = mx + b the coefficient of x is m and hence

m= -2/5 now solving for equation 2

3y=ax-15\\\\y=\frac{ax-15}{3} \\\\y=\frac{ax}{3}-\frac{15}{3}  \\\\y=\frac{a}{3}x-5\\\\

so here if we compare it with y = mx + b the coeffienct of x is a/3 so since parallel lines have same slope by the formula:

m_1=m_2

we equation both the slope to each other to find the value of a like this,

m_1=m_2\\\\\frac{-2}{5}=\frac{a}{3}\\\\-2(3)=a(5)\\\\-6=5a\\-6/5=a

so the value of a equals

a= -6/5

8 0
3 years ago
Write 90% as a decimal and fraction in simplest form
solong [7]
90% as a decimal is .9 and then as a fraction in simplest form is 9/10
Hope it helps
5 0
3 years ago
Each week, tasha saves 90% of the money she earns babysitting and spends the rest. this week she earned $60.00. how much more mo
padilas [110]
She saved $54 spent $6  so she saved $48 more then she spent
6 0
3 years ago
I have no clue how to do this please help-
laiz [17]

Answer:

 X =  2

Step-by-step explanation:

4 0
3 years ago
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