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Feliz [49]
2 years ago
15

Can i have help on this q plz

Mathematics
2 answers:
Alexandra [31]2 years ago
8 0

Answer:

14.8

Step-by-step explanation:

7.4 * 2 = 14.8.

hope this helps

Viktor [21]2 years ago
7 0

Answer:

54.76cm^{2}

Step-by-step explanation:

The area of a shape is base times height. bh

Since this is a square, all of the sides are the same length. Meaning 7.4*7.4 to make 54.76cm^2.

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it takes 1/2 of a box of nails to build a bird house if you wanted to build 5 bird houses how many boxes would you need​
dedylja [7]

Answer:

You would need 2.5

Step-by-step explanation:

You can use a porportion to solve.

\frac{.5}{1} = \frac{x}{5} (cross multiply and solve)

7 0
3 years ago
Find all complex solutions of the equation z⁴-1-i=0.​
bulgar [2K]

Answer:

Step-by-step explanation:

hello :

z⁴=1+i      given : z² = t    t is the complex number  so :   z⁴= (z²)² =t²

solve for  t  this equation : t² = 1+i

if : t = x+iy     t² =(x+iy)² = x²+2xiy+(iy)² =x²-y²+2xyi ......     (  i² = -1)

t² = 1+i  means : x²-y²+2xyi = 1+i

you have this system :   x²-y² = 1.....(*)

                                      2xy  = 1.....(**)

slve for   x  and y    you ca add this equation :   ....(***)

( use : t² = 1+i

/t²/ = /1+i/   so :/t/² = /1+i/ .... (√(x²+y²))²=√(1²+1²) =√2  means x²+y² = √2)

the system is :   x²-y² = 1.....(*)

                         2xy  = 1.....(**)

                         x²+y² = √2 ....(***)

add (*) and (***) : 2x²= 1+√2

x² = (√2+1)/2

substrac  (*) and (***)  you have : y² = (√2-1)/2

use (**) the proudect  xy is positif (same sign)  so :

x=√( (√2+1)/2)  and  y = √( (√2-1)/2)   so :  t1 =√( (√2+1)/2)+i√( (√2-1)/2)  

x= -√( (√2+1)/2)  and  y = -√( (√2-1)/2) so :t2= -t1

same method for equation : z² =t1  ..(2 solution )  and z² = t2..(2 solution )

4 0
2 years ago
PLEASE HURRY
mina [271]

Answer:

X ≥ 3

Step-by-step explanation:

Let the number of grapes you'll buy be X, you need to buy at leaF 3 pounds so:

X ≥ 3

Answered by Gauthmath

5 0
3 years ago
Cereal originally Cost three dollars. The store has reduce the price by 25%. You have a coupon for additional 20% off the alread
Aliun [14]

Answer:

around 1.50 or 1.25

7 0
2 years ago
Read 2 more answers
Round 17.5 to the nearest 1
skelet666 [1.2K]

Answer:

18

Step-by-step explanation:

.5 is 5 4 and below round down 5 and up round up

8 0
3 years ago
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