Do the ratios 10 8 and 5 2 form a proportion? yes or no

No

Step-by-step explanation:

pretend that the larger number in the ratio is always 60

10:8 so 10=60

60÷10 =6

6x8=48

so in 10:8 10=60 and 8=48

60-48= 12

in 5:2

5=30

2=12

30-12=18

10:8 and 5:2 when substituted to a real number will not have the same difference so they are not a proportion

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2