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Vinvika [58]
3 years ago
14

Helpppppp meee please

Mathematics
2 answers:
a_sh-v [17]3 years ago
7 0

Answer:

a) $14.45 b) 1.45x+1.2y

Step-by-step explanation:

5*1.45+6*1.2=14.45

Volgvan3 years ago
4 0

Answer:

7.25 and 7.20

Step-by-step explanation:

I calculated and got it correct

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ME RESULVEN ESTO POR FA
Readme [11.4K]

Answer:

1) 5

2) -4

3) 12

4) -10

5) 2.8

6)-2

7) 2

8) -6

9) -1

4 0
3 years ago
Pouvez vous maider pour la questuon deux merci
Vanyuwa [196]

quelle est ta question?


6 0
3 years ago
What is the area of this triangle?
amid [387]
We can solve for the 3 triangle sides.
The left side is easy 6.
Second side² = 7² + 4²
Second side² = 49 + 16
Second side = square root (65)
Second side = <span> <span> <span> 8.0622577483 </span> </span> </span>
Third Side² = 7² + 2²
Third Side² = 53
Third Side = <span> <span> <span> 7.2801098893 </span> </span> </span>
When we know 3 sides, we use Heron's formula for calculating area:
Perimeter = <span> <span> <span> 21.3423676376 </span> </span> </span>
Semi-Perimeter = <span> <span> <span> 10.6711838188 </span> </span> </span>
Using Heron's Formula
area = square root (<span>10.6711838188 * </span><span>4.6711838188 * </span> <span> <span> <span> 2.6089260705 </span> </span> </span> * <span> <span> <span> 3.3910739295 </span> </span> </span> )
area = square root (441)
area = 21

Yes, it's just that "easy".  LOL

7 0
3 years ago
Work out the value of 8^2+4^3, 5^3-7^2
liberstina [14]

Answer:

302

Step-by-step explanation:

8 0
2 years ago
The sum of three numbers is 75. The third number is 2 times the first. The second number is 9 less than the first. What are the
anygoal [31]
Let the three numbers be x, y and z.  Then x+y+z=75.
z = 2x.  y = x - 9.

Eliminate y and z by substitution:  x + (x - 9) + (2x) = 75

Then 4x = 75 + 9, or 4x = 84.  x = 21, y = 21 - 9 = 12, and z = 2(21) = 42.

Check:  Do 21, 12 and 42 add up to 75?
8 0
3 years ago
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