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LuckyWell [14K]
3 years ago
15

Choose >, <, or = to compare each pair of numbers 0.09 ________ 0.090

Mathematics
1 answer:
weeeeeb [17]3 years ago
7 0

Answer:

=

Step-by-step explanation:

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Number 17 and 18 please and thank you
Mashutka [201]
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18. B because it can be symmetrical either way
3 0
3 years ago
Consider the linear system of equations. y = –x + 9 y = 0.5x – 6 If the solution is (a,–1), what is a? a =
timofeeve [1]

Answer:

a = 10

Step-by-step explanation:

From the solution given, x = a and y = -1

Substitute for x and y in either of the equations

y = -x + 9

-1 = -a + 9

a = 9 + 1 = 10

4 0
3 years ago
Can someone actually help and not tell me to use google. thanks.
solmaris [256]

Answer:

i deserved these

Step-by-step explanation:

3 0
3 years ago
A chemist whishes to prepare 100 liters of 45% purity of sulphuric acid .He has two kinds of acid solutions in stock ,one is 55%
tester [92]

Answer:

the chemist should use 60 liters of 55% solution and 40  litres of 30% solution in order to prepare 100 liters of 45% purity of sulphuric acid.

Step-by-step explanation:

From the given information,

Let x be the litres of 55% pure solution

Let y be the litres of 30% pure solution

Also;

Given that our total volume of solution is  100 litres

x+y =100  ---- (1)

The total solution of pure by related by the sum of the individual pure concentrations to make up the concentration of final solution.

(0.55)(x)+(0.30)(y) = 0.45(100) ---- (2)

From equation (1)

Let ; y = 100 - x

Replacing the value for y = 100 - x into equation (2)

(0.55)(x)+(0.30)(100-x) = 0.45(100)

0.55x + 30 - 0.30x = 45

0.55x - 0.30x = 45 - 30

0.25x = 15

x = 15/0.25

x = 60 liters of 55% solution

From ; y = 100 - x

y = 100 - 60

y = 40  litres of 30% solution.

Therefore, the chemist should use 60 liters of 55% solution and 40  litres of 30% solution in order to prepare 100 liters of 45% purity of sulphuric acid.

7 0
3 years ago
HURRY PLEASE!!! I HAVE TO TURN THIS IN SOON!!!
grigory [225]

Answer: Didn't flip the greater than sign to lesser than.

Step-by-step explanation: When dividing an inequality by a negative the greater than or less than sign switches.

3 0
3 years ago
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