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2 years ago

Help please giving brainliest!!

Mathematics

2 answers:

Naddika [18.5K]2 years ago

6 0

Answer:

Step-by-step explanation:

-1 = -3x + 5

add 3x on both sides

3x - 1 = 5

add 1 on both sides

3x = 6

divide both sides by 3 to get x by itself

x = 2

jarptica [38.1K]2 years ago

5 0

It’s 8 brainliest me plss

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vredina [299]

A.would be 50 cents and im not entirely sure about b but i think its 8

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2 years ago

Find all 2-digit natural numbers that have exactly three factors.

natali 33 [55]

Answer:

25,49.

Step-by-step explanation:

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2 years ago

Solve (x + 2) (x + 3) + (x – 3) (x – 2) – 2x(x + 1) = 0 x = 5 x = 6 x = 7 x = 8

Anna11 [10]

Answer:

x = 6

Step-by-step explanation:

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2 years ago

Compute (3+4i) +(7 − 20i).

Sveta_85 [38]

Answer:

10 -16 i

Step-by-step explanation:

given,

(3+ 4 i) + (7 − 20 i)

for the given complex number

if the number is added of subtracted the real part will add or subtract to the real part and imaginary will add or subtract to the imaginary part.

now

= (3+ 4 i) + (7 − 20 i)

= (3 + 7) + (4+(-20)) i

= 10 + (-16) i

= 10 -16 i

so, the given answer will be 10 -16 i

8 0

2 years ago

A square pyramid has base edge length 14 m. The height of the pyramid is 24 m. Find the surface area of the square pyramid. Use

kotegsom [21]

Answer:

The total surface area is 896 $m^{2}$

Step-by-step explanation:

The square pyramid is a solid with square base and symmetric 4 triangular faces.

Given that the square base is 14 m and height is 24 m.

The apex of pyramid, center of square and center of any edge of square make a right angled triangle.

Let that height if triangular face be "x".

by pythagoras theorm , $x^{2} = 7^{2} + 24^{2} = 625$

x = 25 m

the area of square base is $14^{2} = 196 m^{2}$

the area of each triangular side is  $(\frac{1}{2})(base)(height) = (\frac{1}{2})(14)(25) = 135 m^{2}$ 

such are 4 triangles, thus $(4)(135) = 700 m^{2}$

Thus the total surface area is 196 + 700 = 896 $m^{2}$

8 0

2 years ago