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MAXImum [283]
3 years ago
6

Simplify the expression: 10z+5z+2z

Mathematics
1 answer:
Rufina [12.5K]3 years ago
7 0
The simplified expression is 17z
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The sum of two numbers is -23, and the difference of the larger and the
geniusboy [140]

The two numbers are 29 and -52

Further explanation:

Let x be the larger number

and

y be the smaller number

then according to given statements

x+y = -23\\x-y=81

Adding both equations

x+y+x-y=-23+81\\2x=58\\\frac{2x}{2} =\frac{58}{2}

x=29

Putting x = 29 in first equation

29+y=-23\\y=-23-29\\y=-52

<u>Proof:</u>

Putting the values of x and y in first equation

29-52=-23\\-23=-23

So, The two numbers are 29 and -52

Keywords: Linear equations in two variables, Elimination method

Learn more about linear equations at:

  • brainly.com/question/6943038
  • brainly.com/question/613883

#LearnwithBrainly

7 0
3 years ago
Oscar charges $25 for the first hour of tutoring and $15 for each additional hour of fraction of an hour counting as a whole hou
makkiz [27]

Answer:

Latoya will charge $10 more to tutor for 5.5 hours

Step-by-step explanation:

We shall look at the total charges of both tutors individually.

Oscar charges $25 for the first hour of tutoring and $15 for each additional hour of fraction of an hour counting as a whole hour.

This means that for the first hour, Oscar charges $25.

For every subsequent hour, regardless of whether the student was tutored for the full hour or only partial, Oscar still charges $15 for the particular hour. To clarify, here is an example.

If a student is tutored for 2 hours, the cost for Oscar's tutoring is $25 (first hour) + $15 (second hour) = $40. However, if the student is still tutored for 1.5 hours, the cost for Oscar's tutoring is still $25 (first hour) + $15 (second hour) = $40. This is because Oscar counts the partial minutes as a full hour in tutoring costs.

For 5.5 hours, the cost of Oscar's tutoring is

$25 (first hour) + $15*4 (2nd to 5th hours) + $15 (the last half an hour) = $100.

Now, we shall look at Latoya's tutoring cost.

f(x) =

30x,

0  \leqslant x \leqslant 3

20x,

3 < x \leqslant 6

10x,

x > 6

The tutoring cost depends on x, the number of tutoring hours. In this case, x is 5.5. The cost for 5.5 hour depends on the formula 20x since 5.5 is more than 3 but less than 6.

Hence, the tutoring cost for Latoya is $20*5.5 = $110.

In this case, Latoya charges $110-$100=$10 more to tutor for 5.5 hours.

4 0
3 years ago
Write the equation of the line that passes through the point (-2,-3) and has a slope of 5.
kolezko [41]

Answer: y=5x+7

Step-by-step explanation:

Since we are given the slope, all we have to do is plug in the given point and solve for the y-intercept.

-3=5(-2)+b             [multiply]

-3=-10+b                [add both sides by 10]

b=7

Now, we know the equation is y=5x+7.

6 0
3 years ago
PLEASE HELP. !!!!!!<br> the 4th option is “A translation 2 units left and 1 unit up
Igoryamba
2 units left & 1 unit up
6 0
3 years ago
The director of a marching band asks the band members to line up in rows of four, but one is left over. Then she tries to line t
Hatshy [7]
There are 81 band members.  :-)

4 rows of 20 = 80 ... with one left over   = 80 + 1  (81)
6 rows of 13 = 78 ... with three left over = 78 + 3  (81)
7 rows of 11 = 77 ... with four left over   = 77 + 4  (81)
5 0
3 years ago
Read 2 more answers
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