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steposvetlana [31]
3 years ago
5

I need help with this question

Mathematics
1 answer:
Montano1993 [528]3 years ago
7 0
152 degrees. You just add the angles across from each other
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Show all work to solve 3x^2 + 5x − 2 = 0
Ratling [72]

Answer:

x=1/3 or x=−2

if i can be brainliest that would be great

Step-by-step explanation:

Step 1: Add 2 to both sides.

3x^2+5x−2+2=0+2

3x^2+5x=2

Step 2: Since the coefficient of 3x^2 is 3, divide both sides by 3.

3x^2+5x/3=2/3

x^2+5/3x=2/3

Step 3: The coefficient of 5/3x is 5/3. Let b=5/3.

Then we need to add (b/2)^2=25/36 to both sides to complete the square.

Add 25/36 to both sides.

x^2+5/3x+25/36=2/3+25/36

x^2+5/3x+25/36=49/36

Step 4: Factor left side.

(x+5/6)^2=49/36

Step 5: Take square root.

x+5/6=±√49/36

Step 6: Add (-5)/6 to both sides.

x+5/6+ −5/6=

−5/6±√49/36x=−5/6±√49/36x=

1/3 or x=−2

3 0
3 years ago
On a map, if one centimeter represents 25 kilometers, how many kilometers does 7 centimeters represent?
Elena-2011 [213]

Answer:

x = 175 km

Step-by-step explanation:

We can use ratios to solve this problem.  Put the map distance over the real life distance.

1 cm      7 cm

--------  = ---------

25 km    x km

Using cross products.

1 * x = 7 * 25

x = 175 km

4 0
3 years ago
Triangle ABC has an altitude AH that lies in the exterior of the triangle which of the following could be true about this figure
Sergio [31]

Answer:

In triangle ABC, angle B is obtuse.

Step-by-step explanation:

The type of triangle is obtuse, angle A and C are acute, angle B is obtuse.

6 0
3 years ago
Which is an equation of the line that
Ymorist [56]

Step-by-step explanation:

(5,2) & (10,-3)

the slope of the points are

y2 - y1 / x2- x1

-3-2/10-5

-5/5

-1

the mid point of the given points are

x= x1 + x2/2 , y= y1 +y2 /2

.

.

.

.

( , )

the equation of the line that passes through the given points are as

y+ y1 = m (x+ x1)

:. now put the value of the mid point in y1 and x1 and the value of slope in m

also find the mid point, it's hard to do it in a mobile without calculator and paper and pen

sorry

6 0
1 year ago
Factor the expression 54x+81 using GCF
navik [9.2K]
To factor <span>54x+81 using the greatest common factor, find the GCF of 54 and 81 by listing all factors and finding the biggest.

54 - 1, 2, 3, 6, 9, 18, 27, 54
81 - 1, 3, 9, 17, 81

9 is the gcf, so factor it out.

</span><span>54x+81 = <u>9</u>(6x + 9)</span><span>

</span>
4 0
3 years ago
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