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2 years ago

What is the definition of algebra and give one example of an algebraic problem.

2 answers:

5 0

The part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulas and equations.a system of algebra based on given axioms.

An example is 2y + 7 y=4

lilavasa [31]2 years ago

4 0

Algebra is the devil's arithmetic. I had to repeat it twice bc my teachers were either too lazy to teach it or humilated me.

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If there is a 80% chance of rain and a 70% chance of wind and rain what is the probability that it is windy given that its rainy

dlinn [17]

10 % because 80 - 70 = 10

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2 years ago

Can someone help me with this? No links please

Sphinxa [80]

Answer:

3) $(4x-9)(4x+9)$

Step-by-step explanation:

6 0

2 years ago

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What is the exact circumference of a circle with a radius of 17 millimeters?

anzhelika [568]

The equation of a circumference is 2 $\pi$ r. Since we know that r=17, we plug that into the formula, and get an answer of C. 34

7 0

2 years ago

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4. Two points on a line are (-10, 1) and (5, -5). If

Vsevolod [243]

Answer:

The x-coordinate of another point is zero

Step-by-step explanation:

step 1

Find the slope between the two given points

The formula to calculate the slope between two points is equal to

$m=\frac{y2-y1}{x2-x1}$

we have

$(-10,1),(5,-5)$

substitute in the formula

$m=\frac{-5-1}{5+10}$

$m=\frac{-6}{15}$

Simplify

$m=-\frac{2}{5}$

step 2

Find the x-coordinate of another point

we have

(x,-3)

we know that

If the other point is on the line, then the slope between the other point and any of the other two points must be the same

Find the slope between the points

$(x,-3),(5,-5)$

Remember that

$m=-\frac{2}{5}$

substitute in the formula

$-\frac{2}{5}=\frac{-5+3}{5-x}$

$-\frac{2}{5}=-\frac{2}{5-x}$

the denominators must be the same

$5=5-x$

$x=0$

therefore

The x-coordinate of another point is zero

3 0

2 years ago

Two cars are traveling down the highway with the same speed. If the first car increases its speed by 1km/hr, and the other car d

Olegator [25]

Answer:

The speed of the cars is $32 \frac{km}{h}$

Step-by-step explanation:

First we must first have the clear concept that $speed=\frac{distance}{time}$ or $s=\frac{d}{t}$

Our question is the speed of the cars then the variable to clear will be s.

Let's raise the equation for each car taking into account that we have the following data:

Car 1: $s_{1}=s+1$ , $t_{1}=2$ and $d_{1}= d_{2}$

Car 1: $s_{2}=s-10$ , $t_{2}=3$ and $d_{1}= d_{2}$

The two cars travel the same distance so we will raise the distance formula for each car and then match them.

Car 1

$d_{1}=s_{1}*t_{1}$

$d_{1}=(s+1)*2$

$d_{1}=2s+2$

Car 2

$d_{2}=s_{2}*t_{2}$

$d_{2}=(s-10)*3$

$d_{2}=3s.30$

$d_{1}=d_{2}$

$2s+2=3s-30$

$2+30=3s-2s$

$32=s$

The speed of the cars is 32 km/hr

7 0

3 years ago