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Gennadij [26K]
3 years ago
14

my teacher has 30 red apples and 40 green apples is she adds all of them together how many will she have

Mathematics
2 answers:
maksim [4K]3 years ago
7 0
She will have 70 green apples
aleksley [76]3 years ago
4 0
Your teacher will have 70 apples. Think of it like this: 4+3= 7, and then you add on a zero, since we switched the place value.
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(x+5) (×+5)=49. I need to know what x is, how do I solve this?
Archy [21]
(x+5)^2=49
squaer root both sides
x+5=+/-7
minus 5 both sides
x=-5+/-7
x=-5+7=2
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laiz [17]

Answer:

AB=12\sqrt{3}\ cm

Step-by-step explanation:

If AB is tangent to the circle, then angle ABO is right angle and triangle AOB is special 30^{\circ}-60^{\circ}-90^{\circ} triangle. In this triangle, the leg that is opposite to the angle of 30° is half of the hypotenuse. Thus,

AO=2BO=2\cdot 12=24\ cm.

By the Pythagorean theorem,

AB^2=AO^2-BO^2,\\ \\AB^2=24^2-12^2,\\ \\AB^2=576-144=432,\\ \\AB=12\sqrt{3}\ cm.

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