3 years ago

Sutract -2/8 from 4/5

Mathematics

2 answers:

UkoKoshka [18]3 years ago

7 0

4/5-(-2/8)= 4/5+2/8 On taking LCM = 42/40= 21/20

erastova [34]3 years ago

6 0

Answer:

Subtract

(negative 2 over 8 −

) − 4 over 5

= negative 42 over 40−

Step 1 of 2: Subtract, sub-step a: Find common denominator.

Find common denominator

negative 2 over 8−

− 4 over 5

= −( 2 × 5 ) over ( 8 × 5 )

2 × 5

8 × 5

− ( 4 × 8 ) over ( 5 × 8 )

4 × 8

5 × 8

= negative 10 over 40−

− 32 over 40

40 is the least common multiple of denominators 8 and 5. Use it to convert to equivalent fractions with this common denominator.

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Find the quadratic function that has the vertex (4,5) and passes through the point (8,21) If possible, can you explain the work?

Ganezh [65]

Start by looking at the vertex form of a quadratic function, f(x) = a(x - h)^2 + k. The variables h and k are the values of the vertex. Plug those in to get f(x) = a(x - 4)^2 + 5. To find the variable a, plug in the point given for the x and y values. So, you get (21) = a((8) - 4)^2 + 5. Solve for a algebraically, and you get a = 1. Finally, plug everything in and simplify the equation. You should get that the quadratic function is f(x) = x^2 - 8x + 21. Hope this helps!