1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lbvjy [14]
3 years ago
9

Compute each sum or difference 9/10+7/9 1/2-3/11 2/5-1/15

Mathematics
2 answers:
Galina-37 [17]3 years ago
8 0
1. 9/10 + 7/9 = 81/90 + 70/90 = 151/90 = 1 61/90
2. 1/2-3/11 = 11/22-6/22 = 5/22
3. 2/5-1/15 = 6/15-1/15 = 5/15 =1/3
Helga [31]3 years ago
6 0

Answer:

Step-by-step explanation:

1) 9/10+7/9

The first step is to take the lowest common factor of 10 and 9 in the denominator. It is 90. Therefore,

9/10+7/9 = (9 × 9 + 7 × 10)/90 =

(81 + 70)/90 = 151/90 = 1 61/90

2) 1/2-3/11

The first step is to take the lowest common factor of 2 and 11 in the denominator. It is 22. Therefore,

1/2-3/11 = (11 - 6)/22 = 5/22

3) 2/5-1/15

The first step is to take the lowest common factor of 5 and 15 in the denominator. It is 15. Therefore,

2/5-1/15 = (6 - 1)/15 = 5/15 = 1/3

You might be interested in
Drag the measurements to put them in order From least to greatest 7 g 7 kg seven centigrams 7 mg
Arturiano [62]

Answer:

7 mg, 7 centigrams, 7g, 7kg

3 0
3 years ago
Which ordered pair is the solution to the system of equations?
tiny-mole [99]

Answer:

You can use Gaussian Elimination.

Double both sides of the first equation and add the second equation.

6x + 4y = 8

5x - 4y = 3

---------------

11x      = 11

x = 1

5 - 4y = 3

-4y = -2

y = 1/2

Step-by-step explanation:

7 0
3 years ago
Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at 80 miles per
Deffense [45]

Answer:

1.4 hour, or 1 hr 24 min

Step-by-step explanation:

The trains separate at the rate (80 + 90) mph.

Recall that distance = rate times time, or time = distance / rate.

                                            238 mi

Here, the elapsed time is  -------------- = 1.4 hr, or 1 hr 24 min

                                             170 mph

3 0
3 years ago
Factorise fully the following 2x+8
kakasveta [241]

Answer:

it cant be solved

Step-by-step explanation:

please a brainliest please

7 0
3 years ago
Read 2 more answers
Find the equation of the line that is perpendicular to y = – 1 4 x – 8 and passes though the point (2, –4).
vivado [14]

The equation of the line is y=\frac{1}{4}x-\frac{29}{7}

Explanation:

The equation of the line is perpendicular to y=-14 x-8

The equation is of the form y=mx+b where m=-14

<u>Slope:</u>

The slope of the perpendicular line can be determined using the formula,

m_1 \cdot m_2=-1

-14 \cdot m_2=-1

       m_2=\frac{1}{14}

Thus, the slope of the line is m=\frac{1}{14}

<u>Equation of the line:</u>

The equation of the line can be determined using the formula,

y-y_1=m(x-x_1)

Substituting the slope m=\frac{1}{14} and the point (2,-4), we get,

y+4=\frac{1}{14}(x-2)

Simplifying, we get,

y+4=\frac{1}{14}x-\frac{1}{7}

     y=\frac{1}{14}x-\frac{1}{7}-4

     y=\frac{1}{4}x-\frac{29}{7}

Thus, the equation of the line is y=\frac{1}{4}x-\frac{29}{7}

3 0
3 years ago
Other questions:
  • A high-interest savings account pays 5.5% interest compounded annually. If $300 is deposited initially and again at the first of
    11·2 answers
  • 3. People who smoke are asked to halve the number of cigarettes consumed each day so that any effect on
    13·1 answer
  • From be the degree measure of angle r
    9·1 answer
  • Lily sees 15 tan puppies and 8 white puppies at the pet store how many more tan puppies does she see
    11·1 answer
  • 4y + 7(10 * 3.2) = 264<br> what is y?
    13·1 answer
  • On a scale 1/5 drawing of a car, one part is 8 inches long. How long will the actual car part be?
    6·1 answer
  • Provide 2 examples/2 sets of factors.
    5·1 answer
  • Which angle is congruent to B
    10·1 answer
  • Drag a figure into each blank space so that the two figures in the row match the description.
    12·1 answer
  • Use transformations of f(x)=x2 to graph the following function.<br> g(x)=x2+5
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!