7x2+49x+84=0
by completing the square method

Answer:the correct answer is C

Step-by-step explanation:

Answer: 66

Step-by-step explanation:

Answer:66

Step-by-step explanation:

66/23 as a percent value

Answer:

-2 degrees Celsius.

Step-by-step explanation:

15 - 17 = -2

Answer:

x = 38

∠P = 26º

Step-by-step explanation:

The sum of the angle in a triangle is 180

x + (x + 78) + (x - 12) = 180

Combine like terms

3x + 66 = 180

Subtract 66 from both sides

3x = 114

Divide both sides by 3

x = 38

-----------------------

∠P = x - 12

∠P = 38 - 12

∠P = 26º

Answer:

Step-by-step explanation:

(x+78)+(x-12)+x=180

3x+66=180

3x=114

x=38

P=26

Answer: 1/3

Step-by-step explanation:

numbers more than 4 are: 5, and 6

so 2/6 chance of rolling a number greater than 4

in simplest form this is 1/3

Answer:

number 4 are t is greater

Answer:

64 cubic inches

Step-by-step explanation:

The formula to find the volume of a rectangular prism is

Length x Width x Height

Therefore, 2 x 8 x 4 = 64.

Answer:

60% are girls

Step-by-step explanation:

80 x 1.5 = 120 which is the amount of girls

120 out of 200 is 12/20 or 3.5 which is 60%

Answer:

∠1, ∠5 and ∠8  (a)

Step-by-step explanation:

∠1 because vertical angles are congruent

∠5 because opposite interior angles are congruent

if ∠5 = 70° then ∠8 also equals 70° because of vertical angles

Answer:

1 and 3

Step-by-step explanation:

vertical angles are opposite to each other when angles are created by intersecting lines.

Answer:

1 and 3 our the only vertical angles in this picture HOPE THAT HELPS!

is there a picture to the leaf

Answer:

12 hope this help

Step-by-step explanation:

Answer:

m=3/4

Step-by-step explanation:

first, let's put the line 4x+3y=9 from standard form (ax+by=c) into slope-intercept form (y=mx+b)

we have the equation 4x+3y=9

subtract 4x from both sides

3y=-4x+9

divide by 3

y=-4/3x+3

perpendicular lines have slopes that are negative and reciprocal. If the slopes are multiplied together, the result is -1

so to find the slope of the line perpendicular to the line y=-4/3x+3, we can take the slope of y=-4/3x+3 (-4/3) multiply it by a variable (this is our unknown value), and have that set to -1

(m is the slope value)

-4/3m=-1

multiply by -3/4

m=3/4

therefore the slope of the perpendicular line is 3/4

hope this helps!! :)

Answer:

x = 4i - 1 or

x = 4i + 1

Step-by-step explanation:

(x+1)^2 = -4

x+1 = (+-)4i

x = +-4i - 1

==>

x = 4i - 1 or

x = 4i + 1

Answer:

25.7m

Step-by-step explanation:

Pythagorean Theorem: a^2+b^2=c^2

28^2+b^2=38^2

784+b^2=1444

b^2=660

b=25.6904652 or 25.7m

Answer:

76.2

Step-by-step explanation:

Answer:B.

Step-by-step explanation: Got it right on quiz.

Answer:

b.

stabilizing; disruptive

Step-by-step explanation:

Answer:

[tex]5 \div 11 \times 6 \div 7 = \frac{30}{77} [/tex]

Answer:

D

Step-by-step explanation:

9514 1404 393

Answer:

  C.  Residuals aren't random; linear is not a good fit

Step-by-step explanation:

The attached graph shows the given points (black) and the best-fit line (red). The residuals are connected by the dashed red line. They are decidedly NOT random. It appears that an exponential fit would work better than this linear fit.

The residual values are not randomly dispersed around the horizontal axis, so a linear fit is not appropriate.

Answer:

114

Step-by-step explanation:

Answer:

Area = 115 yards

Step-by-step explanation:

If we look at this as two rectangles, you can see that the area of one is going to be 10yd multiplied by 9yd, which gives us 90yd. The other smaller rectangle will be 6yd multiplied by 4yd, which gives us 24yd.

Now, add the two areas back together to get the area of the whole shape and you get A=115yd.

Hope this helps!

Answer:

c

Step-by-step explanation:

Khan Academy

Answer:

(0.309,0.359)

Step-by-step explanation:

Profit in 2006:  $7 million

First convert the percent into decimal: 9% = 0.09

Then use the percent increase then multiply by the number using this formula: ( 1 + r ) = ( 1 + 0.09) = 1.09

You only want to find how much profit in 2006, so you do this:

2003: 5.4  

2004: 5.4 (1.09) = 5.886  

2005: 5.886 (1.09) = 6.41574  

2006: 6.41574 (1.09) = 6.99316

Then you take 6.99316 and round to the nearest tenth of a million dollars.

7 million dollars.

Answer:

isosceles trapezoid

Step-by-step explanation:

1) find the distance of the points

[tex]\sqrt{(x2-x1)^2 + (y2 -y1)^2}[/tex]

AB = [tex]\sqrt{(4-2)^2 + (7-5)^2} = \sqrt{4 + 4} = \sqrt{8} = 2 \sqrt{2}[/tex]

BC = |7-4| = 3

CD = [tex]\sqrt{(9-7)^2 + (5-7)^2}= \sqrt{4+4} = \sqrt{8} = 2 \sqrt{2}[/tex]

AD = |9-2| = 7

2) equation of the line that passes threw BC

y = 7

3) equation of the line that passes threw AD

y = 5

conclusion

the quadrilateral has two parallel sides and two congruent sides, so it is a isosceles trapezoid

Answer:

isosceles trapezoid

Step-by-step explanation:

hope this helps

Answer:

[tex] \frac{9i}{(9 - r)i} = 3024 \\ (9 - r)i = 9i \div 3024 = 362880 \div 3024 = 120 = \\ = 1 \times 2 \times 3 \times 4 \times 5 = 5i \\ r = 4[/tex]

Answer:

Hello! answer: x = 31

Step-by-step explanation:

This whole thing Will equal 360 we can subtract that by 112 and another 112 because there are two because they are vertical angles so 112 + 112 = 224 360 - 224 = 136 now we divide by 2 since those last two angles will have the same measure 136 ÷ 2 = 68 so now we just have to find out what multiplied by 2 plus 6 = 68 so 2 × 31 = 62 and 62 + 6 = 68 so x = 31 hope that helps! and I showed a visual for you so hopefully this makes more sense!

Answer:

1/3

Step-by-step explanation:

Total number of people who play sports in the Algebra 2 class:

[tex]21 - 9 = 12[/tex]

If there are 10 students who play Basketball, there are 2 students who ONLY play Baseball. If there are 9 students who play Baseball, there are 3 students who ONLY play Basketball.

So the number of students who play BOTH sports is:

[tex]12 - 2 - 3 = 12 - 5 = 7[/tex]

If 7 from the 21 Algebra 2 class students play BOTH sports, the probability is:

[tex]P = \frac{7}{21} = \frac{1}{3}[/tex]

Answer:

thank uuuu

Step-by-step explanation:

Answer:

OMG FREE SLOT!

Step-by-step explanation:

HAZAAAAAAAAAAAAAAAA

Answer:

10 m building in Patrick's drawing would be of  0.5 cm

Step-by-step explanation:

Scale of Patrick's drawing is

1 inch = 10 meters

or 2.54 cm = 10 meters

1 cm = 3.94 m

In case of  Squidward the scale is 2 cm = 40 meters or

1 cm = 20 meters

So a 10 m building in Patrick's drawing would be of

0.5 cm

Answer:

13.5

Step-by-step explanation:  

Given: Patrick’s drawing uses a scale of 1 inch = 10 meters. Squidward made another scale drawing of the hotel with a scale of 2 cm = 40 meters.  

To find: How tall is the hotel on Squidward’s drawing?  

Formula: Height of the building = y × tan x + measurer's height  

Solution: The height of the building is calculated by using the formula. y = distance of the measurer from the building. x = the angle measured from the clinometer.

Answer:

1026.02, you can round that online

Step-by-step explanation: