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3 years ago

The phone company A Fee and Fee has a monthly cellular plan where a customer pays a flat

Mathematics

1 answer:

11111nata11111 [884]3 years ago

8 0

Answer:

The equation is:

y = mx + b

We have two points:

(310, 68) and (620, 99)

Find the slope using these two points:

m = (99 - 68)/(620 - 310) = 31/310 = 0.1

Use one of the points to find the y-intercept b:

68 = 0.1*310 + b
68 = 31 + b
b = 68 - 31
b = 37

The equation is:

y = 0.1x + 37

Find the value of y when x = 980:

y = 0.1*980 + 37
y = 98 + 37
y = 135

The total cost is $135

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5x^2 + 2x - 7=0 thanks

stiv31 [10]

Answer:

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Step-by-step explanation:

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3 years ago

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A broken calculator can double any number or permute its digits (but 0 cannot go up front). Can we start with number 1 and obtai

stira [4]

Answer: it's impossible to obtain 78

Step-by-step explanation: Since the calculator can double any number or permute its digits except 0

starting with number 1

1, 2, 4, 8, 16, 32, 64, 128

Therefore, it's impossible to obtain 78 by a series of these operations

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3 years ago

Find the coordinates of the point 7/10 of the way from A to B. a=(-3,-6) b=(12,4)

Artemon [7]

Answer:

The coordinates of $M$ are $x = \frac{15}{2}$ and $y = 1$ .

Step-by-step explanation:

Let be $A = (-3,-6)$ and $B = (12, 4)$ endpoints of segment AB and $M$ a point located 7/10 the way from A to B. Vectorially, we get this formula:

$\overrightarrow {AM} = \frac{7}{10}\cdot \overrightarrow {AB}$

$\vec M - \vec A = \frac{7}{10}\cdot (\vec B - \vec A)$

By Linear Algebra we get the location of $M$ :

$\vec M = \vec A + \frac{7}{10}\cdot (\vec B - \vec A)$

$\vec M = \vec A +\frac{7}{10}\cdot \vec B - \frac{7}{10}\cdot \vec A$

$\vec M = \frac{3}{10}\cdot \vec A + \frac{7}{10}\cdot \vec B$

If we know that $\vec A = (-3,-6)$ and $\vec B = (12, 4)$ , then:

$\vec M = \frac{3}{10}\cdot (-3,-6)+\frac{7}{10}\cdot (12,4)$

$\vec M = \left(-\frac{9}{10},-\frac{9}{5} \right)+\left(\frac{42}{5} ,\frac{14}{5} \right)$

$\vec M =\left(-\frac{9}{10}+\frac{42}{5} ,-\frac{9}{5}+\frac{14}{5} \right)$

$\vec M = \left(\frac{15}{2} ,1\right)$

The coordinates of $M$ are $x = \frac{15}{2}$ and $y = 1$ .

6 0

3 years ago

(x+3)^2 and x^2+9 is equivalent?

chubhunter [2.5K]

They are not equivalent, try adding in numerical values for x, both do not come out the same.

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3 years ago

In which quadrant is (-1/2, -1.8)?

andrey2020 [161]

X = -1/2 (negative)
y = - 1.8 (negative)

so It's in Quadrant 3

5 0

3 years ago