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SVETLANKA909090 [29]
4 years ago
6

Peggy worked 20 2/3 hours over three days last week. She worked the same number of hours each day. How many hours did Peggy work

each day? Help by writing an equation and solving.
Mathematics
2 answers:
Ilya [14]4 years ago
5 0
20 2/3 hours/ 3 days= 6 8/9 hours/day.

Peggy worked 6 8/9 hours each day~
Butoxors [25]4 years ago
3 0
[20 2/3]/3 can be rewritten as an improper fraction.

20 2/3 = 62/3.  Now we divide 62/3 by 3, which is the same as multiplying by 1/3.

62/9 is the number of hours each day, or 6 8/9 hours.  Almost 7 hours.  And this makes sense, as 20 2/3 is almost 21 hours.
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What are the answers to all of these questions?
VikaD [51]
We have that

N 11)
a) graph the equation  y=x²-3x-10

using a graph tool
see the attached figure

b) Determine the roots of the equations
the roots of the equations are the values for y=0
x²-3x-10=0
x²-3x-10=(x+2)*(x-5)=0
the roots are
x1=-2
x2=5

see the attached figure problem 11

N 12) what is the value of x in the equation? 
3x²=7x

3x²=7x-------> 3x²-7x=0--------> x*(3x-7)=0

x1=0
3x-7=0------> 3x=7------> x=7/3

the values of x are
x1=0
x2=7/3---> 2.33
see the attached  figure problem 12

N 13) what is the value of x in the equation? 
x²-5x=6----------> x²-5x-6=0
x²-5x-6=0-------> (x+1)*(x-6)=0
the values of x are
x1=-1
x2=6

N 14) what is the value of x in the equation? 
2x²-5x=12--------> 2x²-5x-12=0

using a graph tool
see the attached figure problem N 14
2x²-5x-12=0----------> (x+3/2)*(x-4)=0

the values of x are
x1=-3/2
x2=4



7 0
3 years ago
The output of a function is 7 more than 2 times the input. Write and solve an equation to find the input when the output is 15
SCORPION-xisa [38]

Answer:

f(x) = 2x + 7

f(15) = 2(15) + 7 = 30 + 7 = 37

7 0
3 years ago
Help! I need help with these problems. please help.
nata0808 [166]

Answer:

1. medium

2. 20%

3. 12.48

4. Noah

3 0
3 years ago
(1) The roots of 3x - 5 = 7 is x = 4​
aivan3 [116]

Answer:

it's right

Step-by-step explanation:

3x - 5 = 7

3x = 7 + 5

3x = 12

x = 12/3

x = 4

6 0
4 years ago
13 - 2(1 - 15) ÷ 4. Can anyone help me do my homework <br><br> Please help me
Ilia_Sergeevich [38]

Remember to follow PEMDAS.

First, solve the parenthesis.

(1 - 15) = -14

13 - 2(-14) ÷ 4

Next, multiply -2 and -14 (remember to bring the signs.

-2 x -14 = 28

13 + 28/4

Next, divide

28/4 = 7

13 + 7

Finally, subtract

13 + 7 = 20

20 is your answer

hope this helps

4 0
3 years ago
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