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4 years ago

Graph the equation 2y-6x=10

Mathematics

1 answer:

Elanso [62]4 years ago

3 0

This is ur answrr (attached

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The perimeter of a square is 56 cm. What is the approximate length of its diagonal? 10. 6 cm 14. 0 cm 15. 0 cm 19. 8 cm.

kotykmax [81]

Answer:

19. 8 cm.

Step-by-step explanation:

The formulas

P=4a

d=2a

Solving ford

d=2P

4=2·56

4≈19.798cm

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2 years ago

There are 13 dolls in a line. In how many different ways can they be arranged?

rodikova [14]

Answer:

Step-by-step explanation:

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3 years ago

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What is 0.23 rounded to the nearest hundredth

sergiy2304 [10]

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4 years ago

2cos² 34° - 1 expressed as a single trigonometric ratio? (With explanation of steps please)

Degger [83]

Answer:

Cos 68

Step-by-step explanation:

Given the expression 2cos² 34° - 1, we are to expression as a single trig ratio.

Let the angle be theta

Recall that sin²theta + cos²theta = 1

sin²theta = 1 - cos²theta ... 1

also Cos 2theta = Cos²theta - sin²theta ... 2

Substitute 1 into 2

Cos 2theta = Cos²theta - (1-cos²theta)

Cos 2theta = Cos²theta - 1 + cos²theta

Cos 2theta = 2Cos²theta - 1

Replace theta with 34

Cos 2(34)= 2Cos²(34)- 1

Cos 68 = 2Cos²(34)- 1

Hence the single trig expression is Cos 68

5 0

3 years ago

(Number 5)help plzzz

EleoNora [17]

Answer:

See below.

Step-by-step explanation:

So we want to prove that:

$\sqrt8+\sqrt2=3\cdot 2^{\frac{1}{2}}$

First, simplify √8. This is the same as:

$\sqrt8=\sqrt{4\cdot 2}=\sqrt4\cdot\sqrt2=2\sqrt2$

Therefore, our equation is now:

$2\sqrt2+\sqrt2=3\cdot2^{\frac{1}{2}}$

Combine like terms on the left:

$3\sqrt2=3\cdot 2^\frac{1}{2}}$

The square root of something is the same as taking that number to the one-half power. Thus:

$3(2)^\frac{1}{2}}=3\cdot 2^\frac{1}{2}}$

Rewrite:

$3\cdot2^\frac{1}{2}}\stackrel{\checkmark}{=}3\cdot2^\frac{1}{2}}$

And we're done!

6 0

3 years ago