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hichkok12 [17]
3 years ago
12

Which expression is NOT equivalent to 15.-2?

Mathematics
1 answer:
castortr0y [4]3 years ago
7 0

Answer:

As far as I can tell, the answer's the second one! (-2+)!

Step-by-step explanation:

(+3+3) AKA 3+3=6. Not -2

(-2+) AKA -2. Is -2!

(-2+ ) AKA -2+?. Could answer -2 but the space after the positive sign concerned me enough to cross it as not -2...

-3 +15 AKA -3+15=12. Not -2.

-2 +15 AKA -2+15=13. Not -2.

-2 - 15 - 2 AKA -2-15-2=13. Not -2.

There's my answer but since it has weird options with how each is given, I could be wrong? Not 100% sure but it's worth the try! Please mark me brainliest if I'm correct!

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Basically almost finished it just stuck on the last part. The angle of elevation to a nearby tree from a point on the ground is
Studentka2010 [4]

Answer:

12.4 ft

Step-by-step explanation:

Everything is done right so far.

Now to calculate the height of the tree, 12tan46, put the equation into a calculator.

Either a graphing calculator (make sure it is in degrees, not radians),

or the one on your phone (turn your phone landscape in the calculator app to get the trig functions.))

12tan46= 12.4 ft

4 0
2 years ago
Explain how you know a system of equations has
shusha [124]
When they have no solutions, the lines are parlaell, or they have the same slope but different y intercept
example

3x+2y=2 and
3x+2y=4 are paralell
also
y=3x+2 and
y=3x+4 are also parlell, no solutions



infinite solutions are when they are the same line
they have the same slope and y intercept
to find out, simplify
3x+2y=4 and
6x+4y=8 are smae lien
also
y=3x+2 and
2y=6x+4 aer the same line


1 solution is when it is none of the above things
a normal thing, where the slopes are differnet
example
y=2x+2
y=3x+2
4 0
3 years ago
Why is it necessary to apply inverse operations on both sides of the equals l sign when solving an equations
liraira [26]
Take this example (cause it's easy to explain)

10+5x=15x

To solve it we have to minus five on both side. We have to do this because we need to isolate the variable (in this case x) on the one side so we can divide and solve.

You would -5x (inverse from positive 5) from both sides on this because whatever you do to one side you have to do to the others to make it equal. In this case the answer would be x=1 (again cause it's easy lol.)

I hope this helps you!
8 0
3 years ago
Can anyone help me on my HW i can't seem to find the answer to it and when i do it doesn't make sence
Nadusha1986 [10]
0.75x-18.5=0.65x
0.75x-0.65x=18.5
0.1x=18.5
x=18.5/0.1=185

Answer: x=185

To checkt:
0.75(185)-18.5=138.75-18.5=120.25
0.65(185)=120.25
4 0
3 years ago
Can someone please help me!!! ASAP!! SOS!!!.... =( find the following using the given polygon
Phantasy [73]
Answer:
n = 6
a = 6 mm
r = 5.19615 mm
R = 6 mm
A = 93.53 mm2 times $3 = $280.59
P = 36 mm
x = 120 °
y = 60 °


r = inradius (apothem)
R = circumradius 
a = side length
n = number of sides
x = interior angle
y = exterior angle 
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P = perimeter
π = pi = 3.14159...
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3 0
3 years ago
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