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Nataliya [291]
3 years ago
10

6.8 (-0.5) - 2 (5.8)

Mathematics
2 answers:
Zina [86]3 years ago
6 0

Answer:

- 15

Step-by-step explanation:

lukranit [14]3 years ago
4 0

Answer:

-15

Step-by-step explanation:

Step  1  :

           29

Simplify   ——

           5  

Equation at the end of step  1  :

  68     5      29

 (——•(0-——))-(2•——)

  10    10      5  

Step  2  :

           1

Simplify   —

           2

Equation at the end of step  2  :

  68         1      58

 (—— • (0 -  —)) -  ——

  10         2      5  

Step  3  :

           34

Simplify   ——

           5  

Equation at the end of step  3  :

  34   -1     58

 (—— • ——) -  ——

  5    2      5  

Step  4  :

Adding fractions which have a common denominator :

4.1       Adding fractions which have a common denominator

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

-17 - (58)     -15

——————————  =  ———

    5           1

Hope this helps.

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Jayne is making a patchwork quilt. She is following a pattern for a triangular section but only knows the measurements shown. Wh
Novosadov [1.4K]

Answer:

20.0

Step-by-step explanation:

4 0
2 years ago
Solve the system by using the technique of ‘elimination’: -2x+5y=-42,7x+2y=30
Gekata [30.6K]

Solve the following system using elimination:

{5 y - 2 x = -42 | (equation 1)

7 x + 2 y = 30 | (equation 2)

Swap equation 1 with equation 2:

{7 x + 2 y = 30 | (equation 1)

-(2 x) + 5 y = -42 | (equation 2)

Add 2/7 × (equation 1) to equation 2:

{7 x + 2 y = 30 | (equation 1)

0 x+(39 y)/7 = (-234)/7 | (equation 2)

Multiply equation 2 by 7/39:

{7 x + 2 y = 30 | (equation 1)

0 x+y = -6 | (equation 2)

Subtract 2 × (equation 2) from equation 1:

{7 x+0 y = 42 | (equation 1)

0 x+y = -6 | (equation 2)

Divide equation 1 by 7:

{x+0 y = 6 | (equation 1)

0 x+y = -6 | (equation 2)

Collect results:

Answer: {x = 6, y = -6

3 0
3 years ago
Can you help with did pretty please I'm stuck help just a, c ,d thanks luv.
Misha Larkins [42]

Answer:

a) The slope of the function is 3.

c) The equation is represented by n(t) = 3\cdot t + 35.

d) The y-intercept of the function is 35.

Step-by-step explanation:

a) According to the statement, we must assume that number of pieces of mail that must be hand-sorted (dependent variable) is represented by a linear function in terms of time (independent variable). That is:

n(t) = m\cdot t + n_{o} (1)

Where:

m - Slope, measured in number of pieces per minute.

t - Time, measured in minutes.

n_{o} - Initial number of pieces of mail that must be hand-sorted (y-intercept), measured in pieces.

n - Current number of pieces of mail that must be hand-sorted, measured in pieces.

From Geometry, we know that a line can be formed by know two distinct points. If we know that n(15\,min) = 80\,p and n(45\,min) = 170\,p, then the following system of linear equations is formed:

15\cdot m + n_{o} = 80 (2)

45\cdot m + n_{o} = 170 (3)

The solution of the system of equations is:

m = 3 and n_{o} = 35

The slope of the function is 3.

c) By (1) and using results from a) we conclude that the equation function is:

n(t) = 3\cdot t + 35 (4)

d) The y-intercept of the function is 35.

5 0
2 years ago
A typist takes 8 minutes to type 360 words.
Zigmanuir [339]

Well, it cant be option B because then it wuld be half the time (180 mins.)

It cant be option D becasue then it would be over 360 mins, seeing that it only took 8 mins to type 360

And it cant be option C beacuse it would be too small, if 4 mins is to small then 3 mins is worse

Your answer would be A 5 minutes it's just a little bit above 4 mins(half)

6 0
2 years ago
Read 2 more answers
Find the solution to this system.<br><br> Is it (1,2)?
tester [92]
2 lines intersect at (1,2)
so answer is Yes.
(1,2) is the solution to the system.
6 0
3 years ago
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