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3 years ago

The button on Sam's calculator that calculates the sine of an angle is broken.

Mathematics

1 answer:

Galina-37 [17]3 years ago

3 0

Tan 18 = opposite side/adjacent side

0.3249 = 4/adjacent side

and adjacent side = 4/0.3249 = 12.31

Now let's apply Pythagoras to find x

4² + 12.31² = x²
16 + 151.55 = x² and x² = 167.55
Then x = √167.55 and x = 12.94 ≈ 13

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Ron walks 0.5 miles on track in 10 minutes Stevie walks 0.25 mile on the track in 6 minutes find the unit rate for each walker i

Ahat [919]

Answer:

0.5 miles/ 10 minutes* (60 minutes/ 1 hour)= 3 miles/hour.

0.25 miles/ 6 minutes* (60 minutes/ 1 hour)= 2.5 miles/hour.

The unit rate of Ron is 3 miles/hour.

The unit rate of Steve is 2.5 miles/hour.

Therefore, Ron walks faster~

Step-by-step explanation:

3 0

3 years ago

A store is having a sale where winter clothes are 60% of the original price. A sweater is on sale for $30. What is the original

Thepotemich [5.8K]

Answer:$50

Step-by-step explanation:

So we have the sweater that’s $30 with a sale of 60% of the original price.

That means $30=60% of the original

30=60%start with this

5=10% divide 6 by both sides to get 10%

50=100% times by 10 to get 100%, which is the original price.

So the original price of this sweater is $50

4 0

3 years ago

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Please help me i need help pls

OverLord2011 [107]

Answer:

see explanation

Step-by-step explanation:

(b)

30n - 12 ( factor out the gcf 6 from each term )

= 6(5n - 2) ← in factored form

(c)

6x + 9y ( factor out the gcf 3 from each term )

= 3(2x + 3y) ← in factored form

6 0

3 years ago

Math, pls answer now for points I wasted 20 points on this ASAP

allochka39001 [22]

Answer:

The answer to the problem is J

7 0

3 years ago

A rectangular lawn is 2 m longer than it is wide.

PtichkaEL [24]

Let's breadth be x

Length be x+2

ATQ

$\\ \sf\longmapsto x(x+2)=21$

$\\ \sf\longmapsto x^2+2x=21$

Use completing the square method

$\\ \sf\longmapsto 4(x^2+2x)=4(21)$

$\\ \sf\longmapsto 4x^2+8x=84$

$\\ \sf\longmapsto (2x)^2+2(2x)(2)=84$

$\\ \sf\longmapsto (2x)^2+2(2x)(2)+2^2=2^2+84$

$\\ \sf\longmapsto (2x+2)^2=88$

$\\ \sf\longmapsto 2x+2=\pm\sqrt{88}$

As it's dimensions we will take positive

$\\ \sf\longmapsto 2x+2\approx 9.7$

$\\ \sf\longmapsto 2x=9.7-2=7.7$

$\\ \sf\longmapsto x=3.8$

x+2=3.8+2=5.8

Now

$\\ \sf\longmapsto Perimeter=2(L+B)$

$\\ \sf\longmapsto perimeter=2(3.8+5.8)$

$\\ \sf\longmapsto perimeter=2(9.6)$

$\\ \sf\longmapsto Perimeter=19.2m$

Length of 1 strip=13m

Total strips

$\\ \sf\longmapsto \dfrac{19.2}{13}$

$\\ \sf\longmapsto 1.47strips$

She needs 2 strips

3 0

3 years ago

Read 2 more answers