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natka813 [3]
3 years ago
12

Find the value of x.

Mathematics
1 answer:
amm18123 years ago
7 0

Answer:

Step-by-step explanation:

By similar triangles (use the two smaller ones

7 / x = x / 3         Cross multiply

x^2 = 21              Take  the square root of both sides

√x^2 = √21

x = √21

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A circle has a radius of 48 millimeters.
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36pi mm

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A circle has 2pi radians so 3pi/4 is 3/8 of it. The circumference is 96 mm so the length of the arc is 36pi mm.

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What is the unit price of a granola bar if 8 granola bars cost $4.16
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divide 8 by 4.16

Step-by-step explanation:

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The sides of a triangle measure 3 cm, 5 cm, and 7 cm. One of the angles is 120°. Which type of triangle is it?
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Answer:

Obtuse triangle

Step-by-step explanation:

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~

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Consider the line 7x+9y=5
alisha [4.7K]

Answer:

The slope of a line parallel to this line will be: -7/9

The slope of the perpendicular line will be:

\frac{-1}{\frac{-7}{9}}=\frac{9}{7}

Step-by-step explanation:

We know the slope-intercept form

y=mx+b

Here,

  • m is the slope
  • b is the y-intercept

Given the equation

7x+9y=5

simplifying to write in the lope-intercept form

y=-\frac{7}{9}x+\frac{5}{9}

Thus, the slope of the line is: -7/9

The slope of a line parallel to the line:

We have already determined that the slope of the line is: -7/9

  • We know that the parallel lines have the same slope.

Thus, the slope of a line parallel to this line will be: -7/9

The slope of a line perpendicular to the line:

We have already determined that the slope of the line is: -7/9

As we know that the slope of the perpendicular line is basically the negative reciprocal of the slope of the line.

Thus,  the slope of the perpendicular line will be:

\frac{-1}{\frac{-7}{9}}=\frac{9}{7}

4 0
3 years ago
What is y-value when x equals -12? y =-200 - 6(x)
Arada [10]
Hi,

Solving:

x = - 12 \\ y = - 200 - 6( x) \\ y = - 200 - 6( - 12) \\ y = - 200 + 72 = \underline{ \underline{ - 128}}

Answer: y = -128

Hope this helps.
If you have any questions about the answer, comment below and I'll reply.
r3t40
7 1
4 years ago
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