Which expressions represent rational numbers? Check all that apply.

StartRoot 6 EndRoot + StartRoot 9 EndRoot

StartRoot 64 EndRoot + StartFraction 6 Over 11 EndFraction

StartRoot 36 EndRoot + StartRoot 21 EndRoot

StartRoot 16 EndRoot + StartRoot 169 EndRoot

17.ModifyingAbove 43 with bar + StartRoot 49 EndRoot

StartRoot 44 EndRoot + StartRoot 25 EndRoot

Which statements about square roots are true? Check all that apply.

The square root of a positive number cannot be negative.

All positive numbers have two square roots.

StartRoot 18 EndRoot= 9 because 9(2) = 18.

StartRoot 49 EndRoot= 7 because 7(7) = 49.

StartRoot 25 EndRoot = 5 because 52= 25.

Step-by-step explanation:

B,D, and E

1d

2b

3 false

4 d

5 3200sq,ft

80+60+y=180

then divide the difference between 60 and y and add it to 180

so x =180 +( (y-60)/2)

x equals 200

step-by-step explanation:

8

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204