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Levart [38]
2 years ago
15

Evaluate the expression for x = 3 and y = 6. 5(x2 + y) + y2

Mathematics
2 answers:
Svetllana [295]2 years ago
6 0

Answer:

48

Step-by-step explanation:

5(x2+y)+y2

5 x (<u>3 x 2</u> + 6) + 6 x 2

<u>5 x 6</u> + 6 + 6 x 2

30 + 6 + <u>6 x 2</u>

<u>30 + 6 </u>+ 12

36 + 12 = 48

Katen [24]2 years ago
5 0

Answer:

72

Step-by-step explanation:

You might be interested in
Place parentheses in these expressions 12×2+2^3;value:120
telo118 [61]

Answer:

12x(2x2^3)=120

Step-by-step explanation:

12x2+2^3=120

(12x2)+2^3=32

12x(2+2^3)=?

12x(2+8)=?

12x10=120

6 0
3 years ago
Phone, it can expect to sell 1,000-2x phones.
Andreas93 [3]

Answer:

Step-by-step explanation:

The x intercepts are 0 and

1000 - 2x = 0              given condition

1000 = 2x                   Divide by 2

500 = x

So the two intercepts are 0,0 and 500,0

The intercepts mean that for (0,0) the phone company hasn't charged anything, yet. For 500,0 the phone company can sell a single phone -- not when they cost 500 dollars apiece.

The answer to the B part is completing the square.

r(x) = - 2x^2 + 1000x

r(x) = -2(x^2 - 500x )

1/2 ( 500) = 250

250^2 is what you put inside the bracket's to complete the square.

r(x) =  - 2(x^2 - 500x + 250^2) + 2*250^2

r(x) = -2(x - 250)^2 + 2*62500

r(x) = - 2(x - 250)^2 + 125000

They should sell their phones at 250 dollars a piece. The total revenue is 125000. Your graph shows exactly the same thing.

4 0
2 years ago
-. Six square-based pyramids fit exactly onto the six faces of a
igor_vitrenko [27]

Answer:

60

Step-by-step explanation:

6 0
3 years ago
A car travels from City A to City B at
Debora [2.8K]

Answer:

90? maybe... i'm not positive but i hope it helped

Step-by-step explanation:

3 0
3 years ago
Simplify. (-5.12) - (-4.7) (7.021)
aksik [14]
First, you should do the product first:
(-4.7)* (7.021)= -32.9987

Then, let's do the subtraction:
(-5.12)- (-32.9987)
= (-5.12)+ 32.9987
= 27.8787

Final answer: 27.8787

Hope this would help~
7 0
3 years ago
Read 2 more answers
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