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ale4655 [162]
3 years ago
13

What are the possible values of x in 8x2 + 4x = -1?

Mathematics
2 answers:
Aleksandr [31]3 years ago
7 0
X= -4.25

Hope this helps ya!
nikklg [1K]3 years ago
3 0
8·2+4x=-1
16+4x=-1
-16          -16
4x=-17
÷4      ÷4

x=-4.25
i hope it helps
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(5,7) (7,9) find slope
evablogger [386]

Answer:

1

Step-by-step explanation

Since you are given two points you can calculate the slope by use the formula Y1-Y2/X1-X2.

In this case:

Y1 = 5

Y2 = 7

X1 = 7

X2 = 9

(5-7)/(7-9) = -2/-2 = 1

8 0
3 years ago
From a point 80m from the base of a tower, the angle of elevation to the top of the tower is 28 degrees how tall is the tower
Nadusha1986 [10]

The height of the tower is 42.54 m.

Solution:

The reference image of the answer is attached below.

Given data:

BC = 80 m, ∠C = 28°

$\tan\theta = \frac{\text{Opposite}}{\text{Adjacent}}

$\tan28^\circ = \frac{AB}{BC}

$\tan28^\circ = \frac{h}{80}

$0.5317 = \frac{h}{80}

Multiply by 80 on both sides, we get

42.536 = h

Switch the sides.

h = 42.536

h = 42.54 m

The height of the tower is 42.54 m.

5 0
4 years ago
Is the height of a person and the person's age linear
denis23 [38]

Answer:

um no i think it depends on what type of genes you have because when i was 10 or 9 my height was 5'3

Step-by-step explanation:

7 0
3 years ago
What is the value of X
Serga [27]

Answer:

X = 10.4

Step-by-step explanation:

Since the angle is a 90 degress angle we can assume that

39 + (5x-1) = 90 degrees.

Therefore we can subtract 39 from both sides which will give us

5x-1=51

Add 1 to both sides

5x = 52

Divide both sides by 5

x=52/5

The answer is

X = 10.4

Hope this helps! :)

7 0
2 years ago
In a grocery store, a tub of ice cream that usually costs $4.50 is on sale for 10% off. what is the sale price after the discoun
weqwewe [10]
$4.05

4.50x .10= .45
4 0
3 years ago
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