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bazaltina [42]
3 years ago
9

4b - a if a=2 b=4 find its answer

Mathematics
1 answer:
romanna [79]3 years ago
5 0

Answer:

14

Step-by-step explanation:

if b=4 and a=2, then you substitute both those values into the equation, turning (4b - a) into (4*4 - 2), then you use order of operations, meaning you multiply the 4 times the 4, which turns it into 16-2, and then subtract 2 to finally reach your answer of 14.

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How many complex roots does the polynomial equation below have? x7 - 3x5 + 4x2 - 1 = 0
inysia [295]

Answer:

  • 4 complex roots

Step-by-step explanation:

The easiest way is to use a graphing tool and solve it graphically.

We did it with Desmos and it shows 3 real roots, see below.

The polynomial is of degree 7, hence it should have 7 roots.

Since there are 3 real roots, the remaining ones are complex, so there are 4 complex roots

7 0
3 years ago
243.875 to nearest tenth, hundredth, ten, and hundred
IgorC [24]
243.875 to the nearest tenth = 243.9
243.875 to the nearest hundredth = 243.88
243.875 to the nearest ten = 240
243.875 to the nearest hundred = 200
This number is going to be a little bit trickier. The basic law of rounding is that is the number is less than 5, it is going to stay the same. If the number is greater than or equal to 5 then it rounds up to the next number.
8 0
3 years ago
A triangular plot of land has side lengths of 2,000 feet, 2,100 feet and 2,900 feet. Does the plot of land form a right triangle
Bingel [31]

The plot of land forms right triangle.

Step-by-step explanation:

Let,

the three sides are a,b and c.

The sum of square of two sides equals to the square of third side. We will consider the larger side as c, therefore,

a= 2000 feet

b= 2100 feet

c= 2900 feet

Using Pythagoras theorem;

a^2+b^2=c^2\\(2000)^2+(2100)^2=(2900)^2\\4000000 + 4410000 = 8410000\\8410000 feet = 8410000 feet

As the three sides satisfy pythagoras theorem, therefore, the plot of land form right triangle.

The plot of land forms right triangle.

Keywords: triangle, pythagoras theorem

Learn more about pythagoras theorem at:

  • brainly.com/question/12700460
  • brainly.com/question/12773544

#LearnwithBrainly

3 0
4 years ago
Use the rules for long divide 262 by 9
Lady bird [3.3K]
29.11 reccuring is the answer i got
3 0
4 years ago
Is a temperature of 98 above zero negative or positive
mina [271]
Positive. Keyword is 'above' zero meaning positive numbers. Negative would be 'below' zero.
5 0
4 years ago
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