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2 years ago

Need help really bad please and thank you!

Mathematics

2 answers:

victus00 [196]2 years ago

8 0

Answer:30.9 cm

Step-by-step explanation: =X/35

X= 35 cos 28'

X= 30. 90cm

width 06

Rectangle = 30.9cm

VLD [36.1K]2 years ago

5 0

Answer:

Step-by-step explanation:

The side opposite the given width of x is also x.

So you have to relate 3 facts.

The angle

The adjacent side

The hypotenuse.

Formula

Cos(28) = x / 35

Solution

Cos(28) = x / 35 Multiply both sides by 35

35 cos(28) = 35 * x / 35 Cancel

35 cos(28) = x Multiply

30.90 = x

Rounded, it is 30.9

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5c squared- d squared+3/2c - 4d...c= -1. d= -4

riadik2000 [5.3K]

For this case we have the following expression:

$5c ^ 2-d ^ 2 + \frac {3} {2} c-4d$

We must find the value of the expression when:

$c = -1\\d = -4$

Substituting we have:

$5 (-1) ^ 2 - (- 4) ^ 2 + \frac {3} {2} (- 1) -4 (-4) =\\5 (1) -16- \frac {3} {2} + 16 =\\5-16- \frac {3} {2} + 16 =\\-11- \frac {3} {2} + 16 =\\- \frac {25} {2} + 16 =\\\frac {-25 + 32} {2} =\\\frac {7} {2}$

Finally, the value of the expression is:

$\frac {7} {2}$

ANswer:

$\frac {7} {2}$

5 0

3 years ago

Suppose you have an isosceles triangle with a 90° angleIf the congruent sides each measure 9 feet, what is the length of the sid

Zepler [3.9K]

Answer:

$9\sqrt{2}$ feet

Step-by-step explanation:

Consider the attached figure.

An isosceles triangle is a triangle in which two sides are equal.

$AB=BC=9$ feet

According to Pythagoras theorem,

square of hypotenuse is equal to sum of squares of other two sides.

$AC^2=AB^2+BC^2\\AC^2=9^2+9^2\\AC^2=81+81\\AC^2=162\\AC=\sqrt{162}$

$AC=9\sqrt{2}$ feet

6 0

3 years ago

0.30+0.31+0.32+0.33+...0.49+0.50

AlladinOne [14]

Answer:

2.25

Step-by-step explanation:

Just add it up, IDK if it's the full answer because you had 3 dots (...).

8 0

3 years ago

There are 20 more pennies than nickels in a jar. There are 5 times as many pennies as nickels in the jar. How much money is in t

Mamont248 [21]

Answer:

Step-by-step explanation:

p=n+20

p=5n

5n=n+20

n=5

p=20+5

p=25

6 0

2 years ago

……….help…..me …….pls..

svet-max [94.6K]

Answer:

Here,

(cosθ + sinθ/sinθ) – (cosθ – sinθ/cosθ) = secθ cscθ

Now, Cross Multiplication

(cosθ + sinθ/sinθ) – (cosθ – sinθ/cosθ) = secθ cscθ

cosθ(cosθ + sinθ) – sinθ(cosθ – sinθ)/sinθ cosθ

cos²θ + sinθ cosθ – sinθ cosθ + sin²θ/sinθ cosθ

cos²θ + sin²θ/sinθ cosθ

Here, we know the identity

cos²θ + sin²θ = 1

So,

cos²θ + sin²θ/sinθ cosθ can be written as

1/sinθ cosθ

Here, we also know the identity

1/sinθ = cscθ

1/cosθ = secθ

1/sinθ cosθ can be written as

secθ cscθ

= L.H.S

Hence Proved!!

<u>-TheUnknownScientist</u><u> 72</u>

5 0

2 years ago