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3 years ago

Help pls I’ll give u BARINLIEST

Mathematics

1 answer:

e-lub [12.9K]3 years ago

8 0

Answer:

the ratio is 1 : 1.75

Step-by-step explanation:

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Which of these numbers: 3, 4, 18, 111, 123, 340, 345, 456, 555 ... Are multiples of 3, but not multiples of 9?

Stella [2.4K]

Answer:

555,3, 111, 123, 345, 456

3 0

3 years ago

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The ratio of the lengths of the sides of △ABC is 2:3:4. Points M, N, and K are the midpoints of the sides. Perimeter of △MNK equ

laila [671]

Answer: Hence, the length of sides will be 3.2 in, 4.8 in., 6.4 in.

Explanation:

Since we have given that

Ratio of lengths of the sides of ΔABC is 2:3:4

So, the length of first side 'AB' be 2x

Length of second side 'BC' be 3x

Length of third side 'AC' be 4x

Now, we have given that M,N,K are the midpoints of the sides ,

As shown in the figure below:

As we know the Mid-point theorem which states that the line joining the midpoints is always parallel to the third side and half to the third side too.

So by applying this we get,

Length of MN is given by

$\frac{4x}{2}=2x$

Length of NK is given by

$\frac{2x}{2}=x$

Length of MK is given by

$\frac{3x}{2}=1.5x$

Also, we have given that perimeter of ΔMNK is 7.2 in.

So,

$MN+NK+MK=7.2\\x+2x+1.5x=7.2\\4.5x=7.2\\x=1.6$

So, the length of AB is given by

$2x=2\times 1.6=3.2\ in.$

Length of AC is given by

$3x=3\times 1.6=4.8\ in.$

Length of BC is given by

$4x=4\times 1.6=6.4\ in.$

Hence, the length of sides will be 3.2 in, 4.8 in., 6.4 in.

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4 years ago

#25 need help ASAP!!!!!

miv72 [106K]

Answer:

You need to find the surface of each area and sum them up.

Step-by-step explanation:

You will need the surface area for each side.

So 2 up-bottom, 2 left-right and two front-back

2*(4*3) + 2*(2*4) + 2(3*2)

2*12 + 2*8 + 2*6

24 + 16 + 12

Total area = 52

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4 years ago

What's the recursive definition for the sequence 1,2,4,8,16

erma4kov [3.2K]

It is repeated to double the previous number.

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3 years ago

Let Upper A equals left bracket Start 2 By 2 Matrix 1st Row 1st Column negative 2 2nd Column 4 2nd Row 1st Column 1 2nd Column 3

Yuliya22 [10]

Answer: a) AB = $\left[\begin{array}{ccc}-14&26\\-11&22\end{array}\right]$ ; b) $\left[\begin{array}{ccc}5&-5\\13&9\end{array}\right]$ ; c) No, they are different; d) No, they are never the same;

Step-by-step explanation:

a) A = $\left[\begin{array}{ccc}-2&4\\1&3\end{array}\right]$ , B = $\left[\begin{array}{ccc}-2&1\\-3&7\end{array}\right]$ . This multiplication is possible, because matrix A has 2 columns and matrix B has 2 rows. When those value are equal, the multiplication is possible.

AB = $\left[\begin{array}{ccc}-2&4\\1&3\end{array}\right]$ . $\left[\begin{array}{ccc}-2&1\\-3&7\end{array}\right]$ = $\left[\begin{array}{ccc}-14&26\\-11&22\end{array}\right]$

b) BA = $\left[\begin{array}{ccc}-2&1\\-3&7\end{array}\right]$ . $\left[\begin{array}{ccc}-2&4\\1&3\end{array}\right]$ = $\left[\begin{array}{ccc}5&-5\\13&9\end{array}\right]$

c) As, we can see, parts a and b are differents.

d) With matrices, multiplication is not commutative, which means AB≠BA

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4 years ago

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