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Nata [24]
3 years ago
9

If 5(3x – 7 ) = 20, then what is 6x – 8? * 8 12 14 16

Mathematics
1 answer:
den301095 [7]3 years ago
5 0

Step-by-step explanation:

hope it helps............

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What two number multiply to negative 20 and add to 19
OLEGan [10]
x;\ y-the\ numbers\\\\  \left\{\begin{array}{ccc}xy=-20\\x+y=19&\Rightarrow&x=19-y\end{array}\right\\\\subtitute\ to\ first\ equation:\\\\(19-y)y=-20\\19y-y^2+20=0\\-y^2+19y+20=0\ \ \ |change\ signs\\y^2-19y-20=0\\y^2-20y+y-20=0\\y(y-20)+1(y-20)+0\\(y-20)(y+1)=0\iff y-20=0\ or\ y+1=0\\\\y=20\ or\ y=-1

x=19-y\\\\for\ y=20\Rightarrow x=19-20=-1\\\\for\ y=-1\Rightarrow x=19-(-1)=20\\\\Answer:\boxed{\boxed{20\ and\ -1}}
4 0
3 years ago
100% - 9/10<br> Pleeaaase help
Over [174]

Answer:

-0.8  or 991/10

(also it can be 10%)

Step-by-step explanation:

991            

 ——— = 99.10000  

 10              

Step by step solution :

Step  1  :

            9

Simplify   ——

           10

Equation at the end of step  1  :

         9

 100 -  ——

        10

Step  2  :

Rewriting the whole as an Equivalent Fraction :

2.1   Subtracting a fraction from a whole

Rewrite the whole as a fraction using  10  as the denominator :

           100     100 • 10

    100 =  ———  =  ————————

            1         10    

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

2.2       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:

100 • 10 - (9)     991

——————————————  =  ———

      10           10  

Final result :

 991            

 ——— = 99.10000  

 10              

4 0
4 years ago
Read 2 more answers
The table represents the multiplication of two binomials. A geometric model with 2 columns and 2 rows. The first column is label
sergejj [24]

Answer:

A: -3x

B: 14x

C: -21

A and B

Step-by-step explanation:

says so

4 1
4 years ago
Read 2 more answers
What are the coordinates of point A? On a coordinate plane, point A is 5 units to the right and 4 units up. (5, 4) (4, 5) (4, 6)
djyliett [7]

Answer:(5,4)

Step-by-step explanation:

3 0
4 years ago
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HELP! WILL MARK BRAINLIEST!!!!
docker41 [41]

Answer:

its c

Step-by-step explanation:

5 0
3 years ago
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