MATHEMATICS HIGH SCHOOL

Simplify -(-2a + 13) + (-9a - 2) - (-7a - 3).12
-12
14a - 12
14a - (-12)

Answers

Answer 1
Answer:

Hi there

-(-2a+13)+(-9-2)-(-7a-3)

-(-2a+13)-9a-2-(-7a-3)

Distribute the negative sign

-(-2a+13)-9a-2+-1(-7a-3)

-(-2a+13)+-9a+-2+-1(-7a)+(-1)(-3)

-(-2a+13)+-9a+-2+7a+3

Distribute

2a+-13+-9a+-2+7a+3

Combine like terms

2a+-13+-9a+-2+7a+3

(2a+-9a+7a)+(-13+-2+3)

=-12

Any questions ?


I hope that's help !


Answer 2
Answer:

Answer:

-12

Step-by-step explanation:

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a square with side length s has an area of 324 square centimeters. this equation shows the area of the square: s^2= 324. what is the side length of the square in centimeters?

Answers

If the square has the side s, and area A=324
then s=√324=18
the side of the square is 18cm

An object that starts at rest accelerates until it is moving at 247 km/h. If it takes 1.7 minutes for this change to occur what is the average acceleration in m/s? 20 PTS!

Answers

I figured out the answer Chaseashley24! The answer to your question is:

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solve the triangle. round lengths to the nearest tenth and angle measures to the nearest degree a=7 b=7 c=5

Answers

Hello,

a,b,c are the sides.

1) first idea
Theorem of Al' Kashi (genralized pythagorean theorem) will help us

a²=b²+c²-2bc cosA  ==>49=49+25-2*7*5*cos A
==>cos A=25/70=5/14 ==>
A=69,075167572361683699967605141899 °≈69°

b²=a²+c²-2ac cos B ==> 49=49+25-2*7*5 * cos B==>cos B=5/14
B=A (triangle is isocele ==> a second method)

C=180-2*69=42°

II)
The triangle isocele is formed with 2 right triangles.
(base=5/2 hypotenuse=7)

cos B=(5/2)/7=5/14 (the same) ==>B=69°
A=B=69°
C=42°

Xia and Hugh measured the lengths of two different ladybugs. Xia's ladybug measured 3 millimeters and Hugh's ladybug measured 2 mil. Which number sentence best represents the difference in length of the two ladybugs, in centimeters?0.5 - 0.3 = 0.2
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Answers

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Quadrilateral LMNO has diagonals that intersect at point P. If LP=NP, MP = y + 25, and OP = 5y + 29, find the length of MO such that LMNO is a parallelogram.. . A.24. B.48. C.61. D.122

Answers

Answer:

The correct option is B.

Step-by-step explanation:

Given information: LMNO is a parallelogram, LMNO has diagonals that intersect at point P, LP=NP, MP = y + 25, and OP = 5y + 29.

Diagonals of parallelogram bisects each other.

Since P is the intersection point of diagonal and MO is a diagonal, so

MP=OP

y+25=5y+29

Subtract y from both the sides.

y+25-y=5y+29-y

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Subtract 29 from both the sides.

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Divide both sides by 4.

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Substitute y=-1 in the above equation.

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the right  answer will be  c.61 that is your answer

The Museum of Science in Boston has an exhibit in which metal balls drop down a chute, bounce around, and wind up in one of 21 bins. After 1000 balls have dropped, the heights within the bins clearly follow a bell-shaped curve. If the standard deviation is 3 bins, approximately how many balls are in bins 1 through 7?

Answers

This is example of Normal distribution. The central bin is: (21+1)/2=11
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