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lord [1]
2 years ago
12

Expand and simplify bracket please quickly

Mathematics
1 answer:
natulia [17]2 years ago
4 0

Answer:

4y²-1/4 is the required answer

Step-by-step explanation:

(2y -  \frac{1 }{2} )(2y +  \frac{1}{2} ) \\ using \: formula \:  {x}^{2}  - y {}^{2}  = (x - y)(x + y) \\ 4y {}^{2}  -  \frac{1}{4}

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NEED ASAP!!<br><br><br> Find the surface area of the pyramid.
alexgriva [62]

A ≈ 473.63

Step-by-step explanation: To find the surface area for a pyramid, we can use this formula: A=lw+l\sqrt{(\frac{w}{2})^2 } +h^2+w\sqrt{(\frac{l}{y} } )^2+h^2

Solution: 10\times10+10\times\sqrt{(\frac{10}{2} } )^2+18^2+10\times\sqrt{(\frac{10}{2} } )^2+18^2=423.63

Let me know if you have any questions.

~ Lily, from Brainly.

7 0
3 years ago
Rewrite the parametric equations in Cartesian form: x(t)=4+t, y(t)=2sqrt(t).<br> y=?
Dmitriy789 [7]

Answer:

Both of these curves are equal to each other.

Step-by-step explanation:

We have

x(t) = 4 + t

and

y(t) = 2 \sqrt{t}

Solve for t in the x function

x = 4 + t

Subsitue this in for t.

y = 2 \sqrt{x - 4}

We get

a square root function shifted to right 4 units and stretched vertically by a factor of 2.

We can also prove this by graphing.

6 0
2 years ago
What’s the value of the expression x=5?
Colt1911 [192]

Answer:

0

Step-by-step explanation:

6 0
3 years ago
Which one is the better option and why need at least four sentences explaining which option is better please someone help
SCORPION-xisa [38]

9514 1404 393

Answer:

  Option B

Step-by-step explanation:

The cost of 6 turkeys at $1 per pound will be between $78 and $90. The cost of 6 turkeys at $20 each, B2G1, will be $80. We imagine that the average weight of turkeys in the 13-15 lb range will usually exceed 13 1/3 pounds, the weight at which the cost per pound is the same. That means, 6 turkeys at $1 per pound will likely cost more than $80, unless extreme effort is made to choose only the lightest turkeys.

Option B is likely to be cheaper; certainly so, if heavier turkeys are preferred.

7 0
3 years ago
1. Which figure has reflection symmetry?
grin007 [14]

Answer:

1. Figure C has reflection symmetry.

2. A and D have reflection symmetry.

Step-by-step explanation:

1. When you cut the arrow horizontally, you get the same shape on each side.

2. When you divide them, you should have symmetry, meaning they are the same when divided/cut.

5 0
3 years ago
Read 2 more answers
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