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3 years ago

Just question 1A and 2A with explanation please. Lots of point and brainliest!

Mathematics

2 answers:

Yakvenalex [24]3 years ago

4 0

Answer:

1a. x + 74.5= 90

subtract both sides by 74.5

x= 15.5° the results

2a. Set up the given

x + 180=180

subtract both sides by 180

x = 0 is the results

Butoxors [25]3 years ago

3 0

1/2 = 0.5

74 & 1/2 = 74 + 1/2 = 74 + 0.5 = 74.5

The complement to this angle is 90 minus the angle, so,

complement = 90 - angle

complement = 90 - 74.5

complement = 15.5

Convert this to a mixed number

15.5 = 15 + 0.5 = 15 + 1/2 = 15 & 1/2

If the given angle is 74 & 1/2 degrees, then the complement is 15 & 1/2 degrees

<h3>Answer: 15 & 1/2 degrees</h3>

==========================================

180 is the given angle. The supplement, let's call it x, will add to the given angle to get 180.

x+180 = 180

x+180-180 = 180-180

x = 0

So if we add 0 to the given angle 180, we get the result 180

<h3>Answer: 0 degrees</h3>

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3 years ago

5t 8=43 whats t.I WILL GIVE 50 POINTS AND IF YOU DONT RECEIVE THE POINTS TELL ME AND I WILL GIVE THEM.PLZ HELP MEEEEEEEEEEEEEEEE

lawyer [7]

==> I can't be sure of the equation. There's a blank space
      between '5t' and '8', where an operation must be.
   I think the operation is more likely ' + ' (addition). Brainly usually
   does show the ' - ' if it's subtraction, but goes blank if it's addition.
   Tell you what I'll do: Since you sound so desperate, and you're being
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----------------------------------------

If it's subtraction:    5t - 8 = 43

Add 8 to each side: 5t = 51

Divide each side by 5 : t = 51/5

   t    = 10 and 1/5

--------------------------------------------

If it's addition: 5t + 8 = 43

Subtract 8 from each side:   5t = 35

Divide each side by 5 : t    = 7

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3 years ago

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SVETLANKA909090 [29]

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Step-by-step explanation:

$5f - 6f = 9 \\ - f = 9 \\ f = - 9$

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Klio2033 [76]

Answer:

the question is incomplete, the complete question is

"Finding Derivatives Implicity In Exercise,Find dy/dx implicity . $x^{2}e^{-x}+2y^{2}-xy$ "

Answer : $\frac{dy}{dx}=\frac{y-(2-x)xe^{-x}}{(4y-x)}$

Step-by-step explanation:

From the expression $x^{2}e^{-x}+2y^{2}-xy$ " y is define as an implicit function of x, hence we differentiate each term of the equation with respect to x.

we arrive at

$\frac{d}{dx}(x^{2}e^{-x )+\frac{d}{dx} (2y^{2})-\frac{d}{dx}xy=0\\$

for the expression $\frac{d}{dx}(x^{2}e^{-x})$ we differentiate using the product rule, also since y^2 is a function of y which itself is a function of x, we have

$(2xe^{-x}-x^{2}e^{-x})+4y\frac{dy}{dx}-x\frac{dy}{dx} -y=0\\\\(2-x)xe^{-x}+(4y-x)\frac{dy}{dx}-y=0 \\$ .

if we make dy/dx subject of formula we arrive at

$(4y-x)\frac{dy}{dx}=y-(2-x)xe^{-x}\\\frac{dy}{dx}=\frac{y-(2-x)xe^{-x}}{(4y-x)}$

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