exam Maths Puzzle Numerical Ability

Express using a positive exponent.

1/y^-7 This is supposed to look like a fraction with a negative exponent.

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exam Other Question

i have a test tomorrow and im strugling can u help solve this question on my review

7n+2[3(l-n)-2(1+n)=14

another question is -10+4(3p+10)=18

one more is 66=-6/5(s+3)
Find the missing coordinate to complete the ordered-pair solution to the given linear equation.

y=6x+5
(a)(0,)
(b)(3,)

5x+2y=9
(a)(7,)
(b)(,-7)