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4 years ago

In finding the solution of the equation

Mathematics

1 answer:

Aneli [31]4 years ago

7 0

Answer:

For any depth y, y, the width will be given by 2 x, 2 x, so we need to solve the equation above for x x ... 2 − 3 Add 3 to both sides. x + 3 = (y − 2) 2 ... .4 n 100 + n represents the concentration C C of an acid solution after n n mL of 40% solution has been added to 100 mL of a 20% solution. First, find the ..

Step-by-step explanation:

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Trigonometry questions

trasher [3.6K]

We'll use standard labeling of right triangle ABC, C=90 degrees, legs a, b, hypotenuse c.

11.

Right triangle, cliff peak A, boat B, angle opposite cliff is B=28.9 deg. adjacent leg a=65.7 m, cliff height is leg b.

tan B = b/a

b = a tan B = 65.7 tan 28.9° = 36.3 m

12.

Similar story, boat at B, opposite b=3.5 m, rope c=12 m

sin B = b/c

B = arcsin b/c = arcsin (3.5/12) = 17.0°

13.

c=124 m, A=58°

sin A = a/c

a = c sin A = 124 sin 58 = 105.2 m

14.

That's a hypotenuse c=4-1.2 = 2.8 m to a height b=1.8m so

cos A = b/c

A = arccos b/c = arccos (1.8/2.8) = 50.0°

15.

Not a right triangle, an isosceles triangle. Half of it is a right triangle with hypotenuse one arm, c=9.8 cm and angle opposite half the base of B=62/2=31°. We're after d=2b:

sin B = b/c

b = c sin B

d = 2b = 2 c sin B = 2(9.8) sin 31 = 10.1 cm

Almost equilateral

4 0

4 years ago

Please help me I tried all day

pishuonlain [190]

1) Rent:
2200*0.3 = 660

2)Utilities:
2200/4 = 550

3)Transportation:
2200*0.1 = 220

4)Groceries:
2200*0.2 = 440

5)Entertainment:
2200*0.1 = 220

6)Other:
2200/20 = 110

Thus the thing that costs 550 is the utilities.
Hope this helps! :)

7 0

3 years ago

Donna takes classes at both Westside community college and pinewood community college. at westside , class fees are $98 per cred

Alex777 [14]

Answer:

Expression for the combined total dollar amount she paid for her class fees is (2185 - 17 w)

Step-by-step explanation:

Let Donna is taking w credit hours at Westside.

Total combined credit hours at two schools = 19 hours

So, the number of credit hours at Pinewood = 19 - w

The per hour fees credit of Westside community college = $98

So, the total fees paid for w hours = w x Fees per hour

= w ( $98) = $(98w)

⇒The fees Donna pays at Westside community college = $ (98 w)

The per hour fees credit of Pinewood community college = $115

So, the total fees paid for (19 -w) hours = (19 -w) x Fees per hour

= (19 -w) ( $115) = $(2185 - 115 w)

⇒The fees Donna pays at Pinewood community college =$(2185 - 115 w)

Hence, the total fees paid by Donna

= Fees at Westside + Fees at Pinewood

= $ (98 w) + $(2185 - 115 w)

= $(2185 - 17 w)

Hence, expression for the combined total dollar amount she paid for her class fees is $(2185 - 17 w)

8 0

4 years ago

Maya wants to paint one wall in her room blue. The wall is 22,9 feet high, and have no doors or windows

Anna35 [415]

Answer:

$229$ Square foot need to be painted, if width is equal to $10$ feet

Step-by-step explanation:

Complete question -

Maya wants to paint one wall in her room blue. The wall is 22,9 feet high, and have no doors or windows. How many square feet need to be painted?

Solution -

The square feet need to be painted will be equal to the product of height and width of the wall i.e surface area of the wall

Let the width of the wall be $10$ feet

Surface area of the wall $= H * W$

Where H is the height of the wall in feet

W is the width of the wall in feet

Substituting the given values in above equation, we get -

$22.9 * 10\\$

$229$ Square foot.

Thus, $229$ Square foot need to be painted

3 0

4 years ago

Please help me branniest <br><br> Any answer without proof will be reported

Anastasy [175]

C) They satisfy equation A but not equation B

________________
EXPLANATION

4y - 3x = 16

4(0.25) - 3(-5) = 16

1 -3(-5) = 16

1 + 15 = 16

16 = 16

-x - 8y = 3

-5 - 8(0.25) = 3

-5 - 2 = 3

-7 = 3

Doesnt solve equation B

(Please mark me brainliest it would be much appreciated)

3 0

3 years ago

Read 2 more answers