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shtirl [24]
3 years ago
6

help me please? thank you.

Mathematics
1 answer:
kumpel [21]3 years ago
4 0

Answer:

it may be 2x bc I kinda learned this but not rlly lol sorry if not

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Find the circumference.
kati45 [8]

69.12ft

11x2 = 22

C= pi x d

= pi x 22

= 22pi

Or

69.11503838

Hope this helps!

4 0
3 years ago
Write an equation in which the quadratic expression 4x^2-26x+42 equals 0. Must show all work to receive credit.
Masteriza [31]

Answer:

(a) (x + 3)(2x + 7) = 0

(b) These solutions mean that for these two x values, f(x) is equal to 0. It's also where the graph of f(x) crosses the x-axis.

Step-by-step explanation:

(a) We set 4x² -26x + 42 equal to 0:

4x² -26x + 42 = 0

Let's divide both sides by 2 to simplify this a bit:

2x² - 13x + 21 = 0

Now, we need factors a and b of 2 and c and d of 21 such that ac + bd = -13. The factors of 2 are: 1 and 2, so let's say a = 1 and b = 2. The factors of 21 are: (1, 21), (3, 7), (-1, -21), and (-3, -7). We see that if c = -7 and d = -3, this works:

ac + bd = 1 * (-7) + 2 * (-3) = -7 - 6 = -13

So, the factored form is:

(x - (-3))(2x - (-7)) = 0

(x + 3)(2x + 7) = 0

(b) So now we need to solve this. Set each of the two parenthetical expressions equal to 0:

x + 3 = 0

x = -3

AND

2x + 7 = 0

x = -7/2

These solutions mean that for these two x values, f(x) is equal to 0. It's also where the graph of f(x) crosses the x-axis.

8 0
4 years ago
Read 2 more answers
Two cars started from the same point. one traveled north at 45 mi/h and the other traveled south at 65 mi/h. how far apart were
Igoryamba
They were 30mi away from each other 
4 0
3 years ago
13. Find the measure of an angle if its measure is eight less than six times its complement.
tatiyna
For an instance, the measure of the angle is represented by y, and the measure of its complement is represented by x. We should write the expression for the problem.
⇒ We can express "eight less" as -8
⇒ We can express "six times its complement" as 6x
The first equation will be
y = 6x - 8

In the second equation, we will describe about the complementary angles. If they add up, the result is 90°. The second equation will be
x + y = 90

Using substitution method, we will find the value of x
x + y = 90
x + 6x - 8 = 90
7x - 8 = 90
7x = 90 - 8
7x = 82
  x = 82/7

Using substitution method, we find the value of y
y = 6x - 8
y = 6(82/7) - 8
y = 492/7 - 8
y = \frac{492}{7}- \frac{56}{7}
y = \frac{436}{7}
y = 62.3
to the near whole number
y = 62

The measurement of the angle is 62°
5 0
4 years ago
Use a proportion to convert 18 grams to milligrams. [Hint: 1,000 mg = 1 g.]
ruslelena [56]
X/18=1000/1
18000=1x
18000mg
5 0
4 years ago
Read 2 more answers
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