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3 years ago

Which matrix represents the system of equations below? {-2x-7y=3 {7x-6y=12

Mathematics

1 answer:

bekas [8.4K]3 years ago

3 0

Answer:

$\left[\begin{array}{ccc}-2&-7\\7&-6\\\end{array}\right] \left[\begin{array}{ccc}x\\y\\\end{array}\right] = \left[\begin{array}{ccc}3\\12\\\end{array}\right]$

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9. What is the value of x if the quadrilateral is a rhombus? 15 5x 4x+3

Andreyy89

X is 3!! you would set the equation as 4x+3=15. Subtract 3 from both sides to get 4x=12. Divide by 4, then you get your answer as x=3. hope this helped!!

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3 years ago

What a number that never gets 1 when you divide 2 when Evan and 3x -1 when odd

IceJOKER [234]

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4 years ago

According to a human modeling project, the distribution of foot lengths of women is approximately Normal with a mean of 23.4 ce

stiv31 [10]

Answer: 22.0.6%

Step-by-step explanation:

Given : According to a human modeling project, the distribution of foot lengths of women is approximately Normal with $\mu=23.3\ cm$ and $\sigma=1.3\ cm$ .

In the United States, a woman's shoe size of 6 fits feet that are 22.4 centimeters long.

Then, the probability that women in the United States will wear a size 6 or smaller :-

$P(x\leq22.4)=P(z\leq\dfrac{22.4-23.4}{1.3})\ \ [\because z=\dfrac{x-\mu}{\sigma}]\\\\\approx P(z\leq-0.77)\\\\=1-P(z\leq0.77)\\\\=1-0.77935=0.2206499\approx0.2206=22.06\%$

Hence, the required answer = 22.0.6%

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3 years ago

Solve the following inequality for x.<br><br> -8.7x < -43.5x + 313.2?

eduard

Answer:

Isolate the variable by dividing each side by factors that don't contain the variable.

Inequality Form:

x < 9

Interval Notation:

(-∞ ,9)

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3 years ago

If y=5-3 and 3x-y=-1 what is the value of y

Oksana_A [137]

Answer: The value of y is 2

Step-by-step explanation:

If y=5-3 and 3x-y=-1

Take y=5-3 first

y = 5 - 3

y = 2

Then, take 3x-y=-1, and put y = 2 in the Expression

3x-y=-1

3x - (2) = -1

3x - 2 = -1

3x = -1 + (-2)

3x = -1 -2

3x = -3

To get x, divide both sides by 3

3x/3 = -3/3

x = -1

Thus, the value of y is 2 while x is -1

7 0

3 years ago

Read 2 more answers