3 years ago

Need help with quadrilaterals

Mathematics

1 answer:

mariarad [96]3 years ago

3 0

The value of x is 72 degrees.

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Can someone solve for x

Helen [10]

bearing in mind that, whenever we have an absolute value expression, is in effect a piece-wise function with a positive and a negative version of the expression, so

$\bf |x^2-4x-5|=7\implies \begin{cases} +(x^2-4x-5)=7\\\\ -(x^2-4x-5)=7 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ +(x^2-4x-5)=7\implies x^2-4x-5=7\implies x^2-4x-12=0 \\\\\\ (x-6)(x+2)=0\implies x= \begin{cases} 6\\ -2 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ -(x^2-4x-5)=7\implies x^2-4x-5=-7\implies x^2-4x+2=0 \\\\\\ (x-2)(x-2)=0\implies x = 2$

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3 years ago

The lifetimes of a certain type of automobile tire have been found to be distributed normally with a mean lifetime of 130,000 km

Lesechka [4]

Answer:

Step-by-step explanation:

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2 years ago

Someone please please help me!!! 20 points!!!

ki77a [65]

2. 3.14 times the radius squared

3 0

3 years ago

Need help....,.....for elearning

tia_tia [17]

Answer:

$72 in^2$

Step-by-step explanation:

First, find the area of the bigger shape. Then, separately, find the smaller shape's area. Subtract the smaller one by the big boi, and you'll get the area of the shaded area. You can count the little squares too.

12*8=96

4*6=24

96-24=72

No.

3 0

4 years ago

The sum of ten and the quotient of a number xxx and 666.

tamaranim1 [39]

Answer:

$10+\dfrac{x}{6}$

Step-by-step explanation:

The wording, "the sum of A and B" translates to the math formula A+B.

The wording, "the quotient of A and B" translates to the math formula A/B.

Then "the sum of 10 and the quotient of x and 6" will translate to the math formula ...

$\boxed{10+\dfrac{x}{6}}$

6 0

3 years ago