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AleksAgata [21]
3 years ago
11

Solve by factoring. x2 - 49 = 0

Mathematics
1 answer:
Gelneren [198K]3 years ago
6 0
Remember
difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)

(x)^2-(7)^2=(x-7)(x+7)

set to zero
x-7=0
x=7

x+7=0
x=-7

x=-7 or 7
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2. Randy has a house that is worth $250,000 but he still owes $175,000. He has a car that is worth $50,000 but he still owes $37
faust18 [17]

Answer:

$91,200

Step-by-step explanation:

I gave it my best shot sorry if it wrong

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3 years ago
If the measure of angle BDC=100°, measure of angle A = 50°, and measure of angle DBC= 30°. which statement is true?
expeople1 [14]
B. triangle ABC is isosceles. The angles add up 180 degrees.
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3 years ago
Help needed if you don't mind
laiz [17]

Personification is when an inanimate object is given human-like qualities in writing, so of the options in question 6, the choice with personification in the sentence would be  b. because the World Trade Center does not have footprints, humans do! :)

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3 years ago
−2 1/6 divided by 1 1/4<br> 100 points
galina1969 [7]

Answer:

  • -1 11/15

Step-by-step explanation:

<u>−2 1/6 divided by 1 1/4:</u>

  • -2 1/6 ÷ 1 1/4 =
  • - 13/6 ÷ 5/4 =
  • - 13/6 × 4/5 =
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8 0
3 years ago
Read 2 more answers
When i am solving for the sides of a right triangle when will i use trigonometric functions
AnnZ [28]

Answer:

The ratios of the sides of a right triangle are called trigonometric ratios. We need to use trigonometric functions to find them when we don't have any angle other than 90 degree shown.

Three common trigonometric ratios are the sine (sin), cosine (cos), and tangent (tan). These are defined for acute angle.

However when we have one angle given with the 90 degree we can deduct without trigonometry but we would use all angles to find the hypotenuse or all angles to find the side of a right angle.

Alternatively, we cna do this with one given angle but if we have one, we might as well work out the other one without trigonometry and do a division with Sin = 25 (sin 35) sin 90  / sin 55

is one example when given the base 25ft that would find the hypotenuse or the length of elevation for buildings looking down or zip-wire questions.

Step-by-step explanation:

       A

       |  \

       l     \

4cm|        \ 5cm

       |          \

       |            \

   B | -  -  -  -  \ C      

          3cm

Suppose we wanted to find sin( A) in△ABC    

(The height of the wall in elevation questions would be used above the base shown 3cm at the start) Sin = 3 (sin 35)° sin 90°  / sin 55° to find the height side (4).

Sine is defined as the ratio of the opposite to the hypotenuse

sin(A) =  hypotenuse          ​= AB/BC        = 3/5

             / opposite

                                           

​

​

6 0
3 years ago
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