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jek_recluse [69]
3 years ago
7

Sam evaluated the expression x2y for x = 7 and y = 9. He got a value of 49. which of the follwing statements is correct

Mathematics
1 answer:
Marrrta [24]3 years ago
7 0
<span>B. sam forgot to multiply. 
 The correct answer is
</span> x^2*y=(7^<span>2)*(9)=49*9=441 </span> 
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Sofia cuts a piece of felt in the shape of a kite for an art project. The top two sides measure 20 cm each and the bottom two si
Phantasy [73]

x + y  = 24       where x and y are the 2 parts of diagonal Other diagonal wil be smaller that 24. 
x^2 + z^2 = 13^2
y^2 + z^2  = 20^2            where z  = 0.5 * length of smaller diagonal)

form last 2 equations

y^2 - x^2  = 20^2 - 13^2  =  231
 now y = 24-x so we have

(24 - x)^2    - x^2 = 231

576 - 48x = 231

48x = 345

x =  7.1875

z^2  =  13^2 - 7.1875^2 =  117.34
z =  1.83

so smaller diagonal = 21.66 cm


looks like its the third choice.



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2 years ago
Find the 7th term of the geometric sequence with the given terms.
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The common ratio is the fifth term divided by the fourth term: -40/-8 = 5.
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If z^1/2 = x^1/2 + y^1/2 , prove that (x + y - z)^2 = 4xy.<br><br>HELPP MEEEEE ​
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The answer is 6 cap use photo math
5 0
3 years ago
Read 2 more answers
0.4(2x+0.3)=1/3(6x-7.2)
GarryVolchara [31]

Answer:

x = 2.1

Step-by-step explanation:

Solve for x:

0.4 (2 x + 0.3) = (6 x - 7.2)/3

Multiply both sides by 3:

3×0.4 (2 x + 0.3) = (3 (6 x - 7.2))/3

(3 (6 x - 7.2))/3 = 3/3×(6 x - 7.2) = 6 x - 7.2:

3×0.4 (2 x + 0.3) = 6 x - 7.2

3×0.4 = 1.2:

1.2 (2 x + 0.3) = 6 x - 7.2

Expand out terms of the left hand side:

2.4 x + 0.36 = 6 x - 7.2

Subtract 6 x from both sides:

(2.4 x - 6 x) + 0.36 = (6 x - 6 x) - 7.2

2.4 x - 6 x = -3.6 x:

-3.6 x + 0.36 = (6 x - 6 x) - 7.2

6 x - 6 x = 0:

0.36 - 3.6 x = -7.2

Subtract 0.36000000000000004` from both sides:

(0.36 - 0.36) - 3.6 x = -0.36 - 7.2

0.36 - 0.36 = 0:

-3.6 x = -0.36 - 7.2

-0.36 - 7.2 = -7.56:

-3.6 x = -7.56

Divide both sides of -3.6 x = -7.56 by -3.6:

(-3.6 x)/(-3.6) = (-7.56)/(-3.6)

(-3.6)/(-3.6) = 1:

x = (-7.56)/(-3.6)

(-7.56)/(-3.6) = 2.1:

Answer:  x = 2.1

8 0
3 years ago
Read 2 more answers
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