10/07/18

#### Matrices question. PLSSSSS HELP.

4. Let n≥2, let A and B b en×n matrices and let On be the n×n matrix with every entry 0.(b) Suppose that A2 = On. Show that In − A is invertible, and that (In − A)-1 = In + A.(c) Suppose that Am =... more

10/03/18

#### What is 21=xy in slope intercept formula

help I can’t figure it out because I know 21/x=y doesn’t work

09/29/18

#### Fifty identical books are stacked in one pile

Fifty identical books are stacked in one pile. The height of each book is 7 cm, to the nearest cm.  Work out the maximum height of the pile.

09/28/18

#### The length of the base of a triangle is twice its height. If the area of the triangle is 361 square​ kilometers, find the height.

The length of the base of a triangle is twice its height. If the area of the triangle is 361 square kilometers, find the height.

09/27/18

A train departs station A at exactly 3:00 pm and travels to station B, which is 7.3km away. The trip takes exactly 34 minutes. What was the average speed of the train in meters per minute?

09/25/18

#### I need help on this problem like now

A rock is thrown upward with a velocity of 24 meters per second from the top of a 20 meter high cliff, and it misses the cliff on the way back down. When will the rock be 7 meters from the water,

09/24/18

in 2008 Liam earned 480 in allowance, and Dalton earned 384 in allowance. Each year Liam earned 24$and Dalron earned$ 36.In what year will they have the same amount? How much will it be?

08/30/18

#### In a group of 22 pupils, 4 play the flute only

In a group of 22 pupils, 4 play the flute only. 3 play the piano only. 7 play neither instrument. A student is selected at random. What is the probability the student plays both instruments?

08/29/18

#### In a group of 36 pupils, 6 play the flute only

In a group of 36 pupils, 6 play the flute only. 6 play the piano only. 13 play neither instrument. A student is selected at random. What is the probability the student plays both instruments?

08/28/18

#### In a group of 35 pupils, 11 play the flute only

In a group of 35 pupils, 11 play the flute only. 8 play the piano only. 15 play neither instrument. A student is selected at random. What is the probability the student plays both instruments?

08/27/18

#### A company makes 110 bags.

A company makes 110 bags.30 of the bags have buttons but no zips. 23 of the bags have zips but no buttons. 23 of the bags have neither zips nor buttons. How many bags have zips on them?

08/27/18

#### In a group of 16 pupils, 2 play the flute only.

In a group of 16 pupils, 2 play the flute only. 3 play the piano only. 4 play both instruments. A student is chosen at random. What is the probability the student plays neither instrument?

06/27/18

#### What step is similar when constructing a circle inscribed in a triangle and a circle circumscribed about a triangle? Construct the angle bisectors of each ang

What step is similar when constructing a circle inscribed in a triangle and a circle circumscribed about a triangle? Construct the angle bisectors of each angle in the triangle. Construct the... more

06/27/18

#### Which equation could be used to solve for the measure of angle Q? Circle N is shown with a quadrilateral OPQR inscribed inside it. Angle O is labeled x degrees

Which equation could be used to solve for the measure of angle Q?Circle N is shown with a quadrilateral OPQR inscribed inside it. Angle O is labeled x degrees. Angle P is labeled y degrees. Angle Q... more

06/13/18

#### When y=x², which of the following expressions is equivalent to -y?

I am confused on what would happen to X

06/12/18

#### how do I make a two-way frequency table with the data given?

A survey asked 296 males and females whether they preferred reading about the news from a newspaper or on the Internet. Of the 137 males, 90 said that they preferred the Internet. Of the 159... more

06/07/18

#### 4 pancakes call for 1/3 of mix. How much mix do i need for 60 pancakes

I need this question answered ASAP

06/04/18

#### Plane cruising speed

An airplane is cruising at an altitude of 10 000 m. It is flying in a straight line away from chandra, who is standing on the ground. If she sees the angle of elevation of the airplane change from... more

05/23/18

#### help with math please its a word problem

The calorie count of a serving of food can be computed based on its composition of carbohydrate, fat, and protein. The calorie count C for a serving of food can be computed using the formula... more

05/11/18

#### Chem Question

Calculate the ratio of moles of acid to moles of base to create a 750 mL buffer solution with pH = 4.2 using acetic acid, CH3OOH, and acetate CH3COO. The ka for acetic acid is 1.8 x 10^(-5). The... more

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