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masha68 [24]
3 years ago
6

|-4|——|4| greater smaller or equal too? PLEASE I NEED HELP!

Mathematics
1 answer:
Verizon [17]3 years ago
6 0

Answer:

Equal

Step-by-step explanation:

When the numbers are in between the 2 lines, it's measuring the distance from 0.

In this case, 4 is 4 from 0. And, -4 is 4 from 0.

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Can someone please answer. There is a picture. There is only one problem. Thank you so much!!!
madam [21]
Hello,

x²/25+y²/9=1

a=5, b=3 c²=a²-b²=25-9=16=4²

Foci are (0,4) and (0,-4)
Answer C
============
3 0
3 years ago
8x+x^2-2y-64+y^2=0 standard form with explanation
xz_007 [3.2K]
X² + 8x +y² - 2y -64 =0
We see that the equation has x² and y² . Also we see that coefficients in front of x² and y² are equal. So this is an equation of the circle.
(x² + 8x) +(y² - 2y) -64 =0
(x² + 8x) +(y² - 2y) = 64
We need to complete square for x and y groups, that means it should be written in form (a+b)² or (a-b)².
Expressions in parenthesis we will write as a²+/-2ab+b², to write it after as (a+/-b)², because  a²+/-2ab+b² = (a+/-b)²

(x² + 2*4x) +(y² - 2*1y) = 64
(x² + 2*4x+4²) +(y² - 2*1y+1²) = 64+4²+1²
(x+4)² + (y-1)²= 81 Sometimes this is called a standard form of the circle.
(x+4)² + (y-1)²= 9² Sometimes it is required to write like this.

And if you are studying circles,ellipses  and hyperbolas, the standard form should look like
\frac{(x+4)^{2}}{9^{2}} + \frac{(y-1)^{2}}{9^{2}} =1






8 0
3 years ago
The mean height of women in a country​ (ages 20-​29) is 64.5 inches. A random sample of 75 women in this age group is selected.
Allushta [10]

Answer:

0.07378

Step-by-step explanation:

We solve using z score formula

z = (x-μ)/σ/√n, where

x is the raw score = 65 inches

μ is the population mean= 64.5 inches

σ is the population standard deviation = 2.99

n = 75

z = 65 - 64.5 /2.99/√75

z = 0.5/0.345255461

z = 1.4482

Probability value from Z-Table:

P(x<25) = 0.92622

P(x>25) = 1 - P(x<25)

= 1 - 92622

= 0.07378

The probability that the mean height for the sample is greater than 65 ​inches is 0.07378

4 0
3 years ago
Write an expression please help me
qwelly [4]

I'm pretty sure it's

(24/3) + x.

Simplify it: 8 + x

4 0
4 years ago
Determine if the angles are complementary, supplementary or vertical. Then find the missing angle.
postnew [5]

Answer:

43

Step-by-step explanation:

Vertically opposite angles.

Here,

b=43 (being vertically opposite angles )

4 0
3 years ago
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