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Nataly_w [17]
3 years ago
5

Length of the side if it’s surface is 54 cm

Mathematics
1 answer:
Mashutka [201]3 years ago
3 0

The side length of what's surface is 54 cm?

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2. If A and B are square matrices of the same order, then (A + B) (A - B) is equal to (a) A²– B² (b) A– BA – AB - B² (c) A² - B²
Anastaziya [24]

Correct option is C) A² - B² + BA – AB

Step-by-step explanation:

(A+B)(A−B)=A(A−B)+B(A−B).........because matrix product is distributive.

=A² + BA - AB - B²

And as matrix product is not commutative, so AB¦=¦BA

Hence option C is correct.

6 0
2 years ago
Which expression is equivalent to 2^4 ⋅ 2^−7?
IRISSAK [1]

the answer for this is:

subtract 7 from 4 to get -3

 you then have 2^-3

remove the negative exponent by rewriting as 1/(2^3)


4 0
3 years ago
Read 2 more answers
Imelda, Susan, and Clara are driving go-carts around a track. Imelda takes 14 minutes, Susan takes 18 minutes, and Clara takes 1
RoseWind [281]

Answer:

630 minutes.

Step-by-step explanation:

That would be the lowest common multiple of 10, 14 and 18

10 = 2 x 5

14= 2 x 7

18 = 2 x 3 x 3

The LCM = 2 x 3 x 3 x 5 x 7

= 630.

4 0
3 years ago
3 step equations, I really need help on these with all the work:
sesenic [268]

Answer:

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Step-by-step explanation:

3 0
2 years ago
Solve 7 ( x + 1 ) + 2 = 5x + 15
yawa3891 [41]

Answer:

x = 3

Step-by-step explanation:

7(x + 1) + 2 = 5x + 15

~Simplify left side

7x + 7 + 2 = 5x + 15

~Combine like terms

7x + 9 = 5x + 15

~Subtract 9 to both sides

7x = 5x + 6

~Subtract 5x to both sides

2x = 6

~Divide 2 to both sides

x = 3

Best of Luck!

5 0
2 years ago
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