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3 years ago

Solve the matrix equation below

Mathematics

1 answer:

Ket [755]3 years ago

6 0

Answer:

We need to distribute the values
Hence [-4 0: 0 - 2 ] +[0 -3: 5 -4] X + [ 0 -3: 5 -4 ] = [19 -27 : 10 -24]

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Corinna's cell phone bill was $52.75 in July.

rodikova [14]

Answer:

The answer is 21.10

Explanation:

If her bill in July was $52.75 and her bill in August was only 60% of July

60% of 52.75 is 31.65

and they asked how much more she paid:

52.75-31.65 = 21.10

hope this helps!

7 0

3 years ago

Find the mean of this data set: {– 78, -12, 3, – 44}

blagie [28]

Answer:

Answer: A. -32.75

$\dashrightarrow{ \tt{mean = \frac{ \sum f(n)}{n} }} \\$

• f(n) are the values of the set

• n is the number of items

$\dashrightarrow \: { \tt{mean = \frac{ - 78 + ( - 12) + 3 + ( - 44)}{4} }} \\ \\ \dashrightarrow \: { \tt{ \frac{ - 131}{4} }} \\ \\ \dashrightarrow \: { \boxed{ \tt{mean = - 32.75}}}$

5 0

3 years ago

12 cos theta minus 16 sin theta is equal to zero find 2 sin theta + cos theta

gayaneshka [121]

Answer:

2sinθ + cosθ = 2

Step-by-step explanation:

12 cos θ - 16 sinθ = 0

=> 3 cos θ -4 sin θ = 0

=> tanθ = 3/4

let P = 3x

B = 4x

=> H= 5x

=> sinθ = P/H = 3/5

cosθ = B/H = 4/5

2sinθ + cosθ

= 2× 3/5 + 4/5

= 6/5+4/5

= 10/5

= 2

=> 2sinθ + cosθ = 2

5 0

3 years ago

Read 2 more answers

Which gives the correct vaules for points A, B, C and D?

sergejj [24]

Step-by-step explanation:

answer b

please mark as brilliant

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3 years ago

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2/3 (x - 7) = -2 what does x equal (2/3 is a fraction not dividing)

ozzi

Answer:

x = 4

Step-by-step explanation:

Given

$\frac{2}{3}$ (x - 7) = - 2

Multiply both sides by 3 to clear the fraction

2(x - 7) = - 6 ← distribute left side

2x - 14 = - 6 ( add 14 to both sides )

2x = 8 ( divide both sides by 2 )

x = 4

5 0

3 years ago

Read 2 more answers