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Nastasia [14]
3 years ago
10

Evaluate the expression 2x^2-y^1+3x^0 for x=3 and y=7

Mathematics
2 answers:
zaharov [31]3 years ago
5 0

Answer:

14

Step-by-step explanation:

Stells [14]3 years ago
4 0

Answer:

2

Step-by-step explanation:

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Which number has a 5 that represents a value ten times greater than the value
amm1812
It would be 42,523 because 50x10=500 and 5 in 42,523 is in the hundreds spot
8 0
3 years ago
18% of what number of 43
erastovalidia [21]

Answer:


Step-by-step explanation:

Answer:

238.888888


Explanation:

Set up a proportion

18%=43

while 100%=x


This gets you 18× x

=

100

×

43


18

×

x

=

4300


Now divide both sides by

18

. The number is

x

=

238

.

¯

8

(a repeating decimal)

3 0
3 years ago
Question
puteri [66]

Answer:

The salt concentration of the mixed solution = 10%

Step-by-step explanation:

First assuming that the concentration of salt given is on a vol% basis.

First solution has 0.7 gallon of 5% salt

Amount of salt in this solution = 5% × 0.7 = 0.035 gallon

Second solution has 0.3 gallon of 22% salt

Amount of salt in this solution = 22% × 0.3 = 0.066 gallon

Total amount of salt in the resulting solution = 0.035 + 0.066 = 0.101 gallon

Total volume of the resulting solution = 0.7 + 0.3 = 1.00 gallon

Concentration of the mixture of salt = (0.101/1) = 0.101 = 10.1% = 10% to the nearest percent

Hope this Helps!!!

3 0
3 years ago
Write an equation that you can use to solve for x.<br><br> Enter your answer in the box.
Leto [7]

Answer:

180=x+60+100

Step-by-step explanation:

Because of vertical angles the angle beside 60 is 100 and 100+60+x would equal 180 degrees

5 0
3 years ago
Read 2 more answers
Factorise the following.​
spin [16.1K]

Answer:

x²(9x– 11)(9x + 11)

Step-by-step explanation:

81x⁴ – 121x²

The expression can be factorised as follow:

81x⁴ – 121x²

x² is common to both term. Thus:

81x⁴ – 121x² = x²(81x² – 121)

Recall:

81 = 9²

121 = 11²

Therefore,

x²(81x² – 121) = x²(9²x² – 11²)

= x²[(9x)² – 11²]

Difference of two squares

x²(9x– 11)(9x + 11)

Therefore,

81x⁴ – 121x² = x²(9x– 11)(9x + 11)

3 0
3 years ago
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