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2 years ago

If n=4, the value of the expression 28-12 + Vn 2 is 15 17 21 helpppppppp

Mathematics

1 answer:

ollegr [7]2 years ago

3 0

Answer:

Step-by-step explanation:

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Esteban has a big jar in his room. He has 600 coins total, and 240 of them are pennies

Aleks [24]

Answer:

Percentage of Pennies is 40

Step-by-step explanation:

Total coins are 600

Pennies are 240

Percentage of pennies = (240/600) × 100%

= 0.4 × 100%

= 40%

3 0

2 years ago

What remainder is represented by the synthetic division below?

denis-greek [22]

The missing answer is 0

3 0

2 years ago

Is 10 a solution of 2y+7(y-3)=60

slamgirl [31]

The answer to 2y+7(y-3)=60 is y=9

6 0

2 years ago

Solve 3(x - 2) < 18.

Musya8 [376]

This answer is 290 because when you skip the math you would find the answer

5 0

3 years ago

In triangle ΔABC, ∠C is a right angle and CD is the height to

Zina [86]

Answer:

$m\angle CDB=90\\m\angle CBD=90-\alpha\\m\angle BCD=\alpha\\\\m\angle CDA=90\\m\angle CAD=\alpha\\m\angle ACD=90-\alpha$

Step-by-step explanation:

The triangles are drawn below.

CD is perpendicular to AB as CD is height to AB.

Therefore, angles $m\angle CDB=m\angle CDA=90$ °

So, triangles ΔCBD and ΔCAD are right angled triangles.

Now, from the right angled triangle ΔABC,

$m\angle A+m\angle B =90\\\alpha+m\angle B=90\\m\angle B=90-\alpha$

From ΔCBD,

$m\angle CBD$ is same as $m\angle B$ .

So, $m\angle CBD=90-\alpha$

$m\angle BCD+m\angle BDC =90\\m\angle BCD+90-\alpha=90\\m\angle BCD=\alpha$

Now, from ΔCAD,

$m\angle CAD$ is same as $m\angle A$

So, $m\angle CAD=\alpha$

$m\angle CAD+m\angle ACD =90\\\alpha+m\angle ACD=90\\m\angle ACD=90-\alpha$

Hence, the unknown angles of both the triangles are:

$m\angle CDB=90\\m\angle CBD=90-\alpha\\m\angle BCD=\alpha\\\\m\angle CDA=90\\m\angle CAD=\alpha\\m\angle ACD=90-\alpha$

5 0

2 years ago