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Nady [450]
3 years ago
15

ANSWER ASAP PLSSSS PLS PLS

Mathematics
2 answers:
sesenic [268]3 years ago
8 0

Answer:

<em>x = 14 ; 58° ; 32°</em>

Step-by-step explanation:

What's the actual question??? ... To find "x" or to find the measure of each angle?

(4x + 2)° + (2x + 4)° = 90°

6x + 6 = 90

6x = 84

<em>x = 14</em>

(4(14)+ 2)° = <em>58°</em>

(2(14) + 4)° = <em>32°</em>

evablogger [386]3 years ago
7 0
Right angle = 90 degrees
4x + 2 + 2x + 4 = 90
6x + 6 = 90
6x = 84
X = 14
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The sum of 9 and a number is less than 12. Which of the following
Fofino [41]

Answer:

9+x<12

Step-by-step explanation:

add 9 to an unknown number.

9+x

use the < less than symbol (instead of an equal sign) and write 12.

3 0
3 years ago
Read 2 more answers
-3x^{2}-21x-54 what are the zeros? (Solutions)
Irina-Kira [14]
The only way to solve if it is equal to something
assuming that the teacher wanted you to make it equal to zero do
0=-3x^2-21x-54

remember if we can do
xy=0 then assume x and y=0

so factor

0=-3x^2-21x-54
undistribute the -3
0=-3(x^2+7x+18)
remember 0 times anything=0 so
x^2+7x+18 must equal zero
use quadratice formula which is

if you have
ax^2+bx+c=0 then
x=\frac{-b+/- \sqrt{b^{2}-4ac} }{2a}

x^2+7x+18
a=1
b=7
c=18

x=\frac{-7+/- \sqrt{7^{2}-4(1)(18)} }{2(1)}
x=\frac{-7+/- \sqrt{49-72} }{2}
x=\frac{-7+/- \sqrt{-23} }{2}
i=√-1
x=\frac{-7+/- i\sqrt{23} }{2}



the zerose would be
x=\frac{-7+ i\sqrt{23} }{2} or \frac{-7- i\sqrt{23} }{2}




4 0
3 years ago
Find B if the graph of the equation 3x=By+2 is perpendicular to the graph of 3y=-2x+4.
Romashka [77]

Answer:

B = \frac{3x}{y} - \frac{2}{y}

8 0
3 years ago
Write the standard equation for the circle.
Sidana [21]

Answer:

the first one

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

here (h, k) = (10, - 6) and r = 6, hence

(x - 10)² + (y - (- 6))² = 6², that is

(x - 10)² + (y + 6)² = 36

5 0
3 years ago
A random sample has been selected from a population. The point estimate = 78.65 and margin of error E = 8.24 for a 90% confidenc
fiasKO [112]

Answer:

90% confidence interval: (70.41,86.89)

Step-by-step explanation:

We are given the following in the question:

Point estimate = 78.65

Margin of error, E = 8.24

Confidence level = 90%

Significance level = 10%

Formula:

\text{Point estimate} \pm \text{Margin of error}

Putting the values, we get,

z_{critical}\text{ at}~\alpha_{0.10} = \pm 1.64

78.65 \pm 8.24 = (70.41,86.89)

(70.41,86.89) is the required 90% confidence interval.

5 0
3 years ago
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