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Sveta_85 [38]
3 years ago
10

In the function y-1 = (4x)² + 7, what effect does the number 4 have on

Mathematics
1 answer:
bija089 [108]3 years ago
8 0

Answer:

D. It shrinks the graph horizontally to 1/4 the original width.

Step-by-step explanation:

f(px): |p|>1 horizontal compression   (x,y) -> (x/p , y)

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What percent of 70 is 28
solniwko [45]
Find 28/70 and then mult. the result by 100%.

Using a calculator, 28/70 = 0.4.  Multiplying this result by 100%, we get 40%.
3 0
3 years ago
Use the original price and the markup to find the retail price.
Ber [7]

Answer:

$45.15

Step-by-step explanation:

When you are dealing with questions with percents in them—like this one—you have to turn the percent into a decimal. To make 7.5% into a decimal, you move the decimal point 2 spaces to the left. So, 7.5% is also 0.075.

Now, we have to use this formula for these types of questions:

x + x(y)= the price with tax (or markup)

So, we can substitute the variables.

42+42(0.075)=the retail price

42(0.075)=3.15

42+3.15=45.15

So, the retail price will be $45.15

5 0
3 years ago
Luke puts $35 in his savings account every month. Use a calculator to find how much money he will save in a year.
ipn [44]
420.00 that's how much he would have saved in a year
8 0
3 years ago
Whats an approximate equation of a line that passes through the points (-4.3,2.3) and (1.3,-7.4)
Wewaii [24]
Use the 2 points to find the gradient of the line
Gradient = (y - y1)/(x - x1), y and y1 are the two different y values.
(2.3 - - 7.4)/(-4.3 - 1.3) = -97/56 = -1.732
Note: y and x both come from the same coordinate, and y1 and x1 also come from the same coordinates - (x , y), (x1 , y1)

Use the following to find the equation (x, x1, y, and y1 are not the same as the first part)
y - y1 = m(x - x1)

Where x2 and y2 is an intersection (one of the coordinates you used) and m is the gradient you found.
So...
y - 2.3 = -1.732(x - - 4.3)
You can simplify this if you are required to.
4 0
3 years ago
Solve for X in the given interval. sec x = -2sr3/3, for pi/2 less than or equal to x less than or equal to pi
notsponge [240]

Answer:

B

Step-by-step explanation:

Using the trig. identity

cos x = \frac{1}{secx}

Given

secx = - \frac{2\sqrt{3} }{3} , then

cos x = - \frac{3}{2\sqrt{3} } × \frac{\sqrt{3} }{\sqrt{3} } = - \frac{3\sqrt{3} }{6} = - \frac{\sqrt{3} }{2} , thus

x = cos^{-1} (- \frac{\sqrt{3} }{2} ) = \frac{5\pi }{6} → B

6 0
3 years ago
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