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iogann1982 [59]
3 years ago
7

Solve each system using a matrix 7x+2y=5 13x+14y=-1

Mathematics
2 answers:
erik [133]3 years ago
8 0

The answer is X=1, y=-1 use

Svetach [21]3 years ago
7 0

Solve each system using a matrix

7x+2y=5

13x+14y=-1Solve each system using a matrix

7x+2y=5

13x+14y=-1

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Penny needs 30 cubic ft of sand to fill a sandbox. She plans to buy 10 bags of sand for her sandbox. Each bag contains 2.9 cubic
Romashka [77]
The correct answer is C.

Because: 2.9 multiplied by 10 bags equals 29cubic ft and she needs 30 cubic ft. So she would need to buy 11 bags to make sure she has enough sand for the whole thing. 11 x 2.9 = 31.9 which ensures she has enough for the whole thing including extra in case. So you answer would be Answer C.
4 0
3 years ago
3 equivalent ratios for 20/15
castortr0y [4]
4/3
40/30
60/45
Simply multiply or divide both the 20 and the 15 to get an equivalent ratio.
7 0
3 years ago
Read 2 more answers
Simplify : 4y^2+12y-40\y^2+2y-8
PSYCHO15rus [73]
2(2y^4 + 7y^3 - 4y^2 -20)
___________________
Y^2


4y^2 - 40/y^2 + 14y - 8

2(-2y^4 - 7y^3 + 4y^2 + 20)
_ _____________________
Y^2
8 0
3 years ago
Evaluate the expression 3.14(a2 + ab) when a = 3 and b = 4. (Input decimals only, such as 12.71, as the answer.)
soldier1979 [14.2K]
A= 3
b= 4

=3.14(a^2 + ab)
substitute the given a & b values in expression

=3.14((3)^2 + (3*4))
multiply inside parentheses

=3.14(9 + 12)
add inside parentheses

=3.14(21)
multiply

=65.94


ANSWER: 65.94

Hope this helps! :)
8 0
3 years ago
Write the ratio in fractional notation in lowest terms. 28 inches to 42 inches
ivolga24 [154]

28 to 42 means 28/42

We now reduce 28/42 to lowest terms.

28 ÷ 7 = 4

42 ÷ 7 = 6

We now have 4/6.

We now reduce 4/6.

4 ÷ 2 = 2

6 ÷ 2 = 3

Final answer: 2/3

7 0
3 years ago
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