4 years ago

-1 1/5 + 3/4 I’m bad with fractions and don’t know how to do these it’s due tomorrow

Mathematics

2 answers:

Dovator [93]4 years ago

8 0

-1 1/5 + 3/4 = -0.45

1/5 is 0.2 in decimal form, and 3/4 is 0.75:

-1.2 + 0.75 = -0.45

Hope this helps!

Vesnalui [34]4 years ago

6 0

First make into improper fraction

-6/5 +3/4

Then find common denominator= 20

-24/20 +15/20 = -9/20

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There are three blue marvels and five red marvels in a bag you randomly select a marble and put it it back in the back if you do

olga nikolaevna [1]

Answer:

25 times

Explanation:

Blue Marvels: 3

Red Marvels: 5

Total Marvels: 5 + 3 = 8 marvels

Probability: favorable outcomes/total outcomes

Probability - red marble = 5/8

After Doing 40 times:

= 5/8 × 40

= 25

7 0

2 years ago

Solve the system using elimination.

Alchen [17]

$\left \{ {{7x+5y=15\ \ |*4} \atop {-6x-4y=-14\ \ |*5}} \right. \\\\ \left \{ {{28x+20y=60} \atop {-30x-20y=-70}} \right. \\+------\\
-2x=-10\ \ \ |Divide\ by\ -2\\
x=5\\\\
5y=15-7x\\
5y=15-7*5\\
5y=15-35\\
5y=-20\ \ \ |:5\\
y=-4\\\\\ Solution\ is\ B(5,-4).$