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4 years ago

Whats the answer to this question plz work it out

Mathematics

2 answers:

IrinaVladis [17]4 years ago

6 0

This is very easy. 5 - 1 is 4. Take one away to reserve for the fraction. 9 - 4 = 5. 1 = 6/6. 6/6 = 4/6 is 2/6 or 1/3. It is 5 2/6 or 5 1/3

denis23 [38]4 years ago

3 0

9 - 5 4/6 I would start by making the mixed fraction a normal one. So 9/1 - 34/6. To get the least common denominator I now have 54/6 - 34/6. I then get 20/6 as my answer. I can reduce this to 10/3.

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Name a three dimensional shape that cannot have a triangle as a two dimensional cross section.

AleksandrR [38]

Answer:

A sphere

Step-by-step explanation:

A cross section of a three dimensional figure is the surface or intersection of the three dimensional figure and a plane, it is the shape obtained by cutting straight through the three dimensional figure

The shape of an inclined cross section of a cube can be a triangle however, he shape of a horizontal and inclined cross section of a sphere is a circle.

8 0

4 years ago

Matrices A and B are square matrices of the same size. Prove Tr(c(A + B)) = C (Tr(A) + Tr(B)).

alexira [117]

Answer with Step-by-step explanation:

We are given that two matrices A and B are square matrices of the same size.

We have to prove that

Tr(C(A+B)=C(Tr(A)+Tr(B))

Where C is constant

We know that tr A=Sum of diagonal elements of A

Therefore,

Tr(A)=Sum of diagonal elements of A

Tr(B)=Sum of diagonal elements of B

C(Tr(A))= $C\cdot$ Sum of diagonal elements of A

C(Tr(B))= $C\cdot$ Sum of diagonal elements of B

$C(A+B)=C\cdot (A+B)$

Tr(C(A+B)=Sum of diagonal elements of (C(A+B))

Suppose ,A= $\left[\begin{array}{ccc}1&0\\1&1\end{array}\right]$

B= $\left[\begin{array}{ccc}1&1\\1&1\end{array}\right]$

Tr(A)=1+1=2

Tr(B)=1+1=2

C(Tr(A)+Tr(B))=C(2+2)=4C

A+B= $\left[\begin{array}{ccc}1&0\\1&1\end{array}\right]+\left[\begin{array}{ccc}1&1\\1&1\end{array}\right]$

A+B= $\left[\begin{array}{ccc}2&1\\2&2\end{array}\right]$

C(A+B)= $\left[\begin{array}{ccc}2C&C\\2C&2C\end{array}\right]$

Tr(C(A+B))=2C+2C=4C

Hence, Tr(C(A+B)=C(Tr(A)+Tr(B))

Hence, proved.

5 0

4 years ago

What is the value of 64 ÷ 2 ∙ 16.

hjlf

64 : 2 · 16 = 32 · 16 = 512

4 0

3 years ago

Read 2 more answers

I hope someone can help me, I usual help people too, it’s for solving equations with systems,hers a photo

blsea [12.9K]

Step-by-step explanation:

Flour needed to make birthday cakes = 2x

Flour needed to make holiday cakes = 1y = y

Maximum amount of Flour allowed = 20 (No more than 20)

Therefore

2x + y must not be more than 20

$2x + y \leqslant 20$

4 0

3 years ago

A cone and a cylinder have congruent height and base bases. The volume of the cone is 18m squared. What's the volume of the cyli

zzz [600]

Short answer 3 times as much = 54 m^3 <<<<< answer

The volumes are krelated by k So solve for k

Volume of Cylinder = k Volume of the cone.
pi r^2 h = k(1/3 pi r^2 h) Since you know that r is the same in both and so is h they divide out.
divide by h
pi r^2 = k (1/3 pi r^2 Divide by pi
r^2 = k (1/3 r^2 ) Divide by r^2
1 = k (1/3) multiply by 3
3 = k

The volume will be 3 times as much.as the cone.
3 * 18 = volume of cylinder.
54 <<<< volume of cylinder.

8 0

3 years ago