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3 years ago

Which strategy would you use to find 2+8 ? explain how you decided.

Mathematics

2 answers:

Solnce55 [7]3 years ago

4 0

Use Computation Strategies for Basic Number Facts. You would use Addition Strategies to find 2 +8.

guajiro [1.7K]3 years ago

4 0

How i would explain how to do 2+8 would to do the equation first by doing 8+2=10 then cheak it by doing 10-8=2 OR 10-2=8

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What single transformation was applied to triangle A to get triangle B?

olga nikolaevna [1]

Answer:

should be reflection

Step-by-step explanation:

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3 years ago

What is the length of the diagonal of a rectangle whose width is 90 cm and whose length is 200 cm? (Round your answer to the nea

Volgvan

Answer: the answer is c.

Step-by-step explanation: Let W, L and D = the width, length and diagonal of the rectangle, respectively.

Then, by the Pythagorean theorem,

W^2 + L^2 = D^2

<=>

D = sqrt(W^2 + L^2)

= sqrt(90^2 + 200^2)

= sqrt(48100)

= 10 sqrt(481)

None of the choices offers an exact solution. However, an approximate solution is:

10 sqrt(481) ≈ 219.317,

which rounds to 219, so the closest answer is C.

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4 years ago

Multiply (5 + 3i)(5 − 3i) 16 + 15i 16 − 15i 16 34

Annette [7]

Answer:

(5 + 3i)(5 − 3i) = 34

Step-by-step explanation:

The multiplication of two identical binomials who have different symbol, can be solved using the factoring case of a difference of squares:

$(a-b).(a+b)=a^{2}-b^{2}$

So, in this case:

$(5+3i).(5-3i) = 5^{2}-(3i)^{2}$

$=25-9i^{2}$

Remember that $i=\sqrt{-1}$

So: $i^{2}=-1$

We replace on the polynomial:

$=25-9.(-1) = 25+9=34$

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4 years ago

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Answer:

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4 years ago

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Vladimir [108]

He will have $8.75 left

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3 years ago

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