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3 years ago

I need 10,11,13 plssss asapppp

Mathematics

1 answer:

Vikentia [17]3 years ago

8 0

#10: Write the slope-int. form of the eq'n thru (-2,-3) and (-2,-1).
change in y -1 - (-3) 2
First, find the slope. m = ----------------- = -------------- = -----------
change in x -2 - (-2) 0

We can NOT divide by zero, so the slope here is undefined. That means that the graph of the line thru these 2 points is a VERTICAL one with no y-intercept.

Since both points are on the line whose x-coordinate is -2, that's the equation of the line:

x = -2.

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A blacksmith blends one alloy of silver that is 35% silver and another that is 95% silver. To the nearest ton, how much of the a

hammer [34]

Answer:

Let x be the unknown quantity of 50% silver.

Look at the silver concentrations... This will be 0.5x of actual silver,

Added to 5% silver in 500g or 0.05(500)g of actual silver

Totaling to (500+x)g of 20% silver which will have 0.2(500+x)g of silver

Your equation is:

0.5x + 0.05(500) = 0.2(500+x)

Solve for x to find the grams of 50% silver used

Step-by-step explanation:

sana maka tulong po sorry po kung mali

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3 years ago

A biker rode 45 miles in 180 minutes. At what speed (in miles per hour) was the biker travelling? A. 4 B. 17 C. 9 D. 12

Anastasy [175]

Answer:

v = 15 miles / hour

Step-by-step explanation:

Given:

Distance covered by biker = s=45 miles

time taken by him = t=180 minutes

TO Find:

speed in miles per hour = v = ?

Solution:

As it is given that the distance covered is 45 miles

and time taken by him is 180 minutes

as one hour have 60 minutes

so time taken by rider = t = 180 /60

= 3 hours

this step is done because we have to find speed in miles per hour

Now

The formula for finding the distance is

distance = speed * time

s = v * t

we have to find v

so dividing both sides by t

$\frac{s}{t} = \frac{v*t}{t}$

it becomes

$v = \frac{s}{t}$

Putting the values

$v = \frac{45}{3}$

solving it gives

v = 15 miles / hour

which is the required speed

in the given options it is not available

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3 years ago

Find c if m A = 70.6°, b = 10.4 in

nata0808 [166]

Answer:

its 7.8

Step-by-step explanation:

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3 years ago

Ira bought a tennis racquet that cost $112. The sales tax rate is 9 percent. What is the total amount that she paid?

zvonat [6]

Wouldnt 9% bc 9 cents ?

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3 years ago

If the discriminant of a quadratic equation is equal to -9, which statement describes the roots?

Mice21 [21]

ANSWER

No real roots.

The roots are complex or imaginary.

EXPLANATION

The quadratic equation

$a {x}^{2} + bx + c = 0$

has discriminant,

$D = {b}^{2} - 4ac$

If the discriminant is less than zero , then the quadratic equation has no real roots.

The given discriminant is -9.

Since -9 is less than zero, it means the quadratic equation has complex or imaginary roots.

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3 years ago