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3 years ago

Kari thinks, "x is the difference between 87 and 34.25 is this true or not?

Mathematics

1 answer:

Pavlova-9 [17]3 years ago

4 0

This is true because it is an unknown number so it is replaced by a variable.

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Solve the equation. −3(y+5)=15

e-lub [12.9K]

Divide both sides by -3

y + 5 = -15/3

Simplify 15/3 to 5

y + 5 = -5

Subtract 5 from both sides

y = -5 - 5

Simplify -5 - 5 to -10

y = -10

8 0

3 years ago

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Alicia and Bennie have decided to play a game. They each draw as many flowers on paper as they can within one minute, repeating

ziro4ka [17]

Answer:

Because The Flowers Bennie drew are independent

3 0

2 years ago

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PLEASE I NEED HELP PLEASE

nexus9112 [7]

Answer: Maybe 72 cm?

Step-by-step explanation: I did 6 times 12

Sorry if it’s wrong :(

6 0

3 years ago

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HELP <3 Match the expressions with their solutions.

densk [106]

Answer:

1 ) sin 165°

2 ) cos 330°

3 ) Tan 157.5°

4 ) $sin^2 157.5$

Step-by-step explanation:

1 )

Given expression is $\sqrt{\frac{1-cos330}{2} }$

We know that $cos2x=1-2sinx^{2}$

$sinx^{2}=\frac{1-cos2x}{2}$

$(sinx/2)^2=\frac{1-cosx}{2}$

So the first expression is sin (330/2)° =sin 165°

2 )

GIven expression is $1-2sin^2165$

We know that $cos2x=1-2sinx^{2}$

So the result is cos 330°

3 )

Given expression is $\frac{1-cos 315}{sin315}$

We know that $cos2x=1-2sinx^{2}$

Also we know that sin2x = 2sinxcosx

So The numerator becomes $2sin^2x/2$ . and the denominator becomes as $2sinx/2cosx/2$

$\frac{2sin^2x/2}{2sinx/2cosx/2}=tanx/2$

So the result is Tan 157.5°

4 )

Given expression is $\frac{1-cos 315}{2}$

We know that $cos2x=1-2sinx^{2}$

$(sinx/2)^2=\frac{1-cosx}{2}$

So the result is $sin^2 157.5$

6 0

3 years ago

Does the following data show direct variation.

nataly862011 [7]

No, the data has no constant

8 0

3 years ago