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Vikki [24]
3 years ago
12

Solve the system of equations using elimination.

Mathematics
1 answer:
AveGali [126]3 years ago
8 0

Answer:

q= 6

r= 7

Step-by-step explanation:

Multiply 1st column by -2:

-30q+8r=-124

5q+8r=86

Subtract 2nd column from the first column:

-35q= -210

Solve for q:

q=6

Subtract q=6 by any of the two equations, so:

-30q+8r=-124

-30*6+8r=-124

Solve for r:

r=7

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20 muffins were bought for £10.60 and sold for £12.40 what was the profit on each muffin
Tasya [4]

Answer: 1.80

Step-by-step explanation:

Profit on each muffin = selling cost-buying cost

=12.40-10.60

=1.80

5 0
3 years ago
Use the prime factors of 3136 and 2744 to evaluate:✓3136/3✓2744​
Tresset [83]

Answer:

3136 = 2^6 × 7^2

2744 = 2^3 x 7^3

✓3136/3✓2744​ = ✓(2^6 × 7^2)/3✓(2^3 x 7^3) = (2^3 x 7)/3 x 14(✓14) = 56/42✓14 =4/3✓14

5 0
3 years ago
A bag contains 7 red, 3 yellow, and 4 blue marbles. What is the probability of pulling out a blue marble, followed by a red marb
Vinil7 [7]

Answer:

2/13

Step-by-step explanation:

4/14 × 7/13  when i simplify it becomes 2/13!!!

6 0
2 years ago
PLEASE HELP
nirvana33 [79]

You don't say whether this is a right triangle or not.

Assuming it is a right triangle, then we use the Pythagorean Theorem to determine the length of the hypotenuse:

(hypo) = (length of third side) = √(12^2 + 4^2) = √(144+16) = √160 = 4√10.

This is approx. 12.65 inches. Since this does not match any of the possible answer choices, we'll have to take a different approach to answering this question.

Given that 2 sides of the given triangle are 12 and 4 inches, respectively, we see that the 3rd side has to be longer than 8 inches; otherwise we'd have three line segments on the same line, not forming a triangle.

By this reasoning, 9 inches is the only possible answer that could be correct. With sides 12, 9 and 4 inches, the triangle would be obtuse and appear quite flat, but not be part of a straight line as with a third side of 8.


6 0
3 years ago
I need help ! We are doing log lines
Delvig [45]

Answer:

exponent

Step-by-step explanation:

To get log2(4)=2

so 2 to the power of 2 is 4

4 is the number between brackets in log

another example

log2(8)=3

2 to the power of 3 is 8

5 0
3 years ago
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