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UkoKoshka [18]
4 years ago
9

Two numbers, when added together make zero

Mathematics
1 answer:
Zigmanuir [339]4 years ago
6 0

Answer:

0+0, -1+1

Step-by-step explanation:

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Two angles whose measures have a sum of 90° are called complementary angles. for exercises 28–30, x and y represent complementar
natulia [17]
28: x+y = 90
we substitute y with the given function 4x - 10
x + 4x - 10 = 905x -10 = 90 5x = 100= 100 ÷ 5x = 20, now you can substitute x in 4x - 10 =4(20) - 1080 - 10 = 70, which makes sense as 20º +70º = 90ºyour 2 angles are 20º and 70º
29:  x + y = 90  x = 2y
Same thing we did above, substitute the given variable into the given equation
so, 2y + y = 90 = 3y=90, divide the 3 to both sides, y = 30, now substitue the y into your given x variable.x = 2(30)x= 60this makes sense as 60º + 30º do equal 90ºyour two angles are 60º and 30º30:  x + y = 90 y = 2 (x - 15)ill do this one without explanation as you know what I am doing from the above examples. here is the work:
x + 2(x-15)=90 (simplify)
x+2x-30 = 903x-30=903x = 120x = 40now input to other equation2(40 - 15) = y (USE PEMDAS)2(25) = yy = 50
makes sense because 50º + 40º = 90ºyour two angles are 50º and 40º

6 0
4 years ago
If it took 7 hours to mow 4 lawns, then at that rate how many lawns can be mowed in<br> 35 hours?
3241004551 [841]

Answer: I'm pretty sure they mowed 61 lawns

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the measure of the third angle?
Shtirlitz [24]

Answer:

45° is your required answer...

4 0
3 years ago
Read 2 more answers
Gretta is having a birthday party and is buying pizza for everyone. She buys 32 pizza for 8.00 dollars. What is the unit rate?
mestny [16]

Answer

= 4 pizzas per dollar

Step-by-st:ep explanation:

This is a fraction equal to

32 pizza ÷ 8 dollars

We want a unit rate where

1 is in the denominator,

so we divide top and bottom by 8

32 pizza ÷ 8

8 dollars ÷ 8

=

4 pizza

1 dollar

=

4 pizza

dollar

= 4 pizzas per dollar

Hope this helps!

4 0
3 years ago
If f(x) = 3x + 3, then f-1(x) =
tensa zangetsu [6.8K]
Mathematically, when you calculate the inverse function (f-1(x)), you’re switching the “inputs” (x) and the “outputs” (f(x)) and then re-solving the equation. So, you’d start with something like:

x = 3*f-1(x) + 3
x - 3 = 3*f-1(x)
(x - 3)/3 = f-1(x)

Your inverse formula would be (x - 3)/3. Hope this helps! (Hopefully Brainly doesn’t mess up the text format.)
7 0
4 years ago
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