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Reika [66]
3 years ago
6

PLEASE ANSWER CORRECTLY, I WILL GIVE BRAINLIEST <3 THANKS IN ADVANCE.

Mathematics
1 answer:
lilavasa [31]3 years ago
4 0

Answer:

B = 40° and D = 60°

Step-by-step explanation:

Just subtract the angles you already know from 90° (since perpendicular means right angle, which is 90°).

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A car uses 1 1/8 gallons of gas to go 13 1/2<br> miles. What is the rate of miles per gallon?
IceJOKER [234]

Answer:

1 1/8 ga / 13.5 mi = .0833 ga / mi

1 / .0833 ga/mi = 12 mi / ga

or .0833 ga/mi * 13.5 mi = 1.25 ga

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3 years ago
Suppose the test scores of students in a class are normally distributed with a mean of 86 and a standard deviation of 4. What is
WARRIOR [948]

Answer:

-2.5

Step-by-step explanation:

Here in this question, we are interested in calculating the z-score for a student that had a particular mark at the test

To calculate the z-score, we need to use a mathematical formula

Mathematically;

z-score = (x - mean)/SD

From the question;

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standard deviation SD = 4

Plugging these values in the equation, we have;

z-score = (76-86)/4 = -10/4 = -2.5

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3 years ago
Billy is two years older than his friend Josh. If the sum of their ages is 26,how old are billy and josh​
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Step-by-step explanation:

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5 0
3 years ago
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Writing an equation of a probably given the vertex and focus
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The equation of the vertical parabola in vertex form is written as

y=\frac{1}{4p}(x-h)^2+k

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The directrix of a parabola is a line which every point of the parabola is equally distant to this line and the focus of the parabola. The vertex is located between the focus and the directrix, therefore, the distance between the y-coordinate of the vertex and the directrix represents the focal distance.

p=1-6=-5

Using this value for p and (3, 1) as the vertex, we have our equation

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