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MrRa [10]
3 years ago
8

X+y=11 (4x² – 3y² = 8 Which equation is part of salving the system by substitution

Mathematics
1 answer:
DanielleElmas [232]3 years ago
8 0
Equation 1, which would be
x=11-y
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I just don’t understand how to do this?i need answers please
Maslowich
1.) 17.1g > 1.71mg
2.) 6.3cm< 63m
3.)1250ml>12.5
4.) 7/12 < 2/3
5.) 7/10 < 11/15
6 0
3 years ago
In 2000, U.S. Airways burned about 115 litres of fuel per passenger. In 2014 that dropped
ankoles [38]

Answer:

22% reduction

Step-by-step explanation:

Find the percent decrease by dividing the difference in amounts by the original amount.

Find the difference:

115 - 90 = 25

Divide this by the original amount:

25/115

= 0.217

So, the percent decrease is 21.7%. Round this to the nearest whole percentage:

= 22

The percent reduction in fuel used was approx. 22%

6 0
3 years ago
Choose the correct answer for the amount of interest earned in the following simple interest problem. A deposit of $4,000 at 9.5
Eduardwww [97]
I=prt
I interest earned
P principle 4000
R interest rate 0.095
T time270/365
I=4,000×0.095×(270÷365)
I=281.10
8 0
3 years ago
Find the cost of 10 pens at x pence each
Reika [66]

Answer:

D. x + 10 pence

Step-by-step explanation:

Since the pen costs 10 pence more than the ruler, we need to add 10 to x.

6 0
2 years ago
Read 2 more answers
What is the answer for (a^2+12c)÷7b-1
vodomira [7]

Answer:

Step-by-step explanation:

Integer roots:

a = 6 n + 1, b = 7, c = -3 n^2 - n, n element Z

a = 6 n + 5, b = 7, c = -3 n^2 - 5 n - 2, n element Z

Derivative:

d/da(1/7 (a^2 + 12 c) b - 1) = (2 a b)/7

Indefinite integral:

integral(-1 + 1/7 b (a^2 + 12 c)) da = (a^3 b)/21 + (12 a b c)/7 - a + constant

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5 0
2 years ago
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