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MAVERICK [17]
3 years ago
8

-4/5 + (-3/8) = what

Mathematics
2 answers:
lapo4ka [179]3 years ago
6 0

Answer:

-1.175

Step-by-step explanation:

-4/5 + (-3/8) = -4/5 + (-3/8) = -4 · 8/5 · 8 + (-3) · 5/8 · 5 = -32/40 + (-15/40) = -32 + (-15)/40 = -47/40

The common denominator you can calculate as the least common multiple of the both denominators - LCM(5, 8) = 40. The fraction result cannot be further simplified by cancelling.

In words - minus four fifth plus minus three eighth = minus forty-seven fortieth.

uysha [10]3 years ago
5 0

Answer:-47/40

Step-by-step explanation:

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Solve the system below using elimination<br> {5x+9y= -10}<br> {7x+10y= -1}
bixtya [17]

∑Hey , jillianwagler ⊃

Answer:

x = 7, y = -5

Step-by-step explanation:

<u><em>Given~:</em></u>

<em>Solve the system below using elimination</em>

<em>{5x+9y= -10}</em>

<em>{7x+10y= -1}</em>

<u><em>Solve:</em></u>

<u><em></em></u>\begin{bmatrix}5x+9y=-10\\ 7x+10y=-1\end{bmatrix}

Isolate x ( 5x + 9y = -10 ) : \mathrm{x=\frac{-10-9y}{5}}

Substitute: \mathrm{x=\frac{-10-9y}{5}}

\begin{bmatrix}7\cdot \frac{-10-9y}{5}+10y=-1\end{bmatrix}

\begin{bmatrix}\frac{-70-13y}{5}=-1\end{bmatrix}

Isolate y : \frac{-70-13y}{5}=1:y=-5

Substitute: y=-5

x=\frac{-10-9\left(-5\right)}{5}=7

Hence, x=7

Therefore, the solution for \begin{bmatrix}5x+9y=-10\\ 7x+10y=-1\end{bmatrix} are:

x=7,\:y=-5

<u><em>xcookiex12</em></u>

<u><em></em></u>

<em>8/19/2022</em>

6 0
2 years ago
THREE QUESTIONS CONCERNING QUADRATIC EQUATIONS: (a) State the four methods used to solve quadratic equations (b) Name the four t
alexira [117]

Answer:

A. Factoring; Completing the Square; Quadratic Formula; Graphing

B. All real numbers; 2 complex roots; 1 real root; 2 distinct real roots

C. 2 complex roots

6 0
3 years ago
In a bag of marbles you have 3 green, 2 yellow, 6 blue, and 9 red marbles. What is the probability of picking a yellow marble fr
slamgirl [31]
The answer is 2 in 20 or 1 in 10, all you have to do is add up the total number of marbles and then have the number of yellow in the total. So 2 in 20. Hope this helps you!
4 0
3 years ago
What is x in the equation 753.6=(3.14)(6)^2(x)
vichka [17]

Answer:

 x = 20/3 = 6.667

Step-by-step explanation:

Changes made to your input should not affect the solution:

(1): "3.14" was replaced by "(314/100)". 2 more similar replacement(s)

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

          (7536/10)-(((314/100))*(6)^2*(x))=0

Step by step solution :

Step  1  :

1.1     6 = 2•3

(6)2 = (2•3)2 = 22 • 32

Equation at the end of step  1  :

 7536      314

 ———— -  ((——— • (22•32)) • x)  = 0

  10       100

Step  2  :

           157

Simplify   ———

           50

Equation at the end of step  2  :

 7536      157

 ———— -  ((——— • (22•32)) • x)  = 0

  10       50

Step  3  :

Dividing exponents :

3.1    22   divided by   21   = 2(2 - 1) = 21 = 2

Equation at the end of step  3  :

 7536     2826

 ———— -  (———— • x)  = 0

  10       25

Step  4  :

           3768

Simplify   ————

            5  

Equation at the end of step  4  :

 3768    2826x

 ———— -  —————  = 0

  5       25  

Step  5  :

Calculating the Least Common Multiple :

5.1    Find the Least Common Multiple

     The left denominator is :       5

     The right denominator is :       25

       Number of times each prime factor

       appears in the factorization of:

Prime

Factor   Left

Denominator   Right

Denominator   L.C.M = Max

{Left,Right}

5 1 2 2

Product of all

Prime Factors  5 25 25

     Least Common Multiple:

     25

Calculating Multipliers :

5.2    Calculate multipliers for the two fractions

   Denote the Least Common Multiple by  L.C.M

   Denote the Left Multiplier by  Left_M

   Denote the Right Multiplier by  Right_M

   Denote the Left Deniminator by  L_Deno

   Denote the Right Multiplier by  R_Deno

  Left_M = L.C.M / L_Deno = 5

  Right_M = L.C.M / R_Deno = 1

Making Equivalent Fractions :

5.3      Rewrite the two fractions into equivalent fractions

Two fractions are called equivalent if they have the same numeric value.

For example :  1/2   and  2/4  are equivalent,  y/(y+1)2   and  (y2+y)/(y+1)3  are equivalent as well.

To calculate equivalent fraction , multiply the Numerator of each fraction, by its respective Multiplier.

  L. Mult. • L. Num.      3768 • 5

  ——————————————————  =   ————————

        L.C.M                25  

  R. Mult. • R. Num.      2826x

  ——————————————————  =   —————

        L.C.M              25  

Adding fractions that have a common denominator :

5.4       Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

3768 • 5 - (2826x)     18840 - 2826x

——————————————————  =  —————————————

        25                  25      

Step  6  :

Pulling out like terms :

6.1     Pull out like factors :

  18840 - 2826x  =   -942 • (3x - 20)

Equation at the end of step  6  :

 -942 • (3x - 20)

 ————————————————  = 0

        25      

Step  7  :

When a fraction equals zero :

7.1    When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

 -942•(3x-20)

 ———————————— • 25 = 0 • 25

      25    

Now, on the left hand side, the  25  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  -942  •  (3x-20)  = 0

Equations which are never true :

7.2      Solve :    -942   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation :

7.3      Solve  :    3x-20 = 0

Add  20  to both sides of the equation :

                     3x = 20

Divide both sides of the equation by 3:

                    x = 20/3 = 6.667

One solution was found :

                  x = 20/3 = 6.667

6 0
4 years ago
Three fourths of a number increased by 4 is at most 19
Ray Of Light [21]
But what is the question
4 0
4 years ago
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