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
love history [14]
3 years ago
13

Can someone help me with these two

Mathematics
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

The first equation answer is 10

And the second one 6

Step-by-step explanation:

The first equation

2/5 x +3= 2/3x +1/3

2x + 15/5 = 6x+3/9 the cress cross

9(2x + 15) = 5(6x + 3)

18x + 135 = 30x +15

135-15 = 30x - 18x

120 = 12x

120/12 =12x/12

10 = x

X =10

The second one

-2.6b +4 =0.9b - 17

-2.6b - 0.9b = - 17 - 4

-2.6b + (-0.9b) = - 17 + (-4)

-3.5b = - 21

-3.5b/-3.5 = - 21 /-3.5

B= 6

You might be interested in
5. Sarah made 17 out of 25 free throws during practice. What percentage of free throws did she NOT make? A. 68% B. 58% C. 32% D.
Elanso [62]

Answer:

C. 32%

Step-by-step explanation:

The percent 17 is of 25.

17 of 25 can be written as:

17/25

To find percentage, we need to find an equivalent fraction with denominator 100. Multiply both numerator & denominator by 100

17/25 * 100/100

= (17 * 100/25) * 1/100 = 68/100

Therefore, the answer is 68%

If Sara made 68% of her free shows, that means she didn't make 32% of her free throws (100 - 68 = 32).

5 0
2 years ago
Walden's family is shopping for a reclining chair. The chair the family decided on has a retail price of $800 plus 5% sales tax
hoa [83]
I dont get what the letter mean what goes with each thing
3 0
3 years ago
The point (Negative StartFraction StartRoot 2 EndRoot Over 2 EndFraction, StartFraction StartRoot 2 EndRoot Over 2 EndFraction)
sveticcg [70]

The values of cosine Ф and cotangent Ф are \frac{-\sqrt{2} }{2} and -1

Step-by-step explanation:

When a terminal side of an angle intersect the unit circle at

point (x , y), then:

  • The x-coordinate is equal to cosine the angle between the positive part of x-axis and the terminal side
  • The y-coordinate is equal to sine the angle between the positive part of x-axis and the terminal side
  • If x and y coordinates are positive, then the angle lies in the 1st quadrant
  • If x-coordinate is negative and y-coordinate is positive, then the angle lies in the 2nd quadrant
  • If x and y coordinates are negative, then the angle lies in the 3rd quadrant
  • If x-coordinate is positive and y-coordinate is negative, then the angle lies in the 4th quadrant

∵ The terminal ray of angle Ф intersects the unit circle at point (\frac{-\sqrt{2} }{2},\frac{\sqrt{2} }{2})

- According to the 1st and 2nd notes above

∴ cosФ = x-coordinate of the point

∴ sinФ = y-coordinate of the point

∵ The x-coordinate of the point is negative

∵ They-coordinate of the point is positive

- According the the 4th note above

∴ Angle Ф lies in the 2nd quadrant

∵ x-coordinate = \frac{-\sqrt{2} }{2}

∴ cosФ = \frac{-\sqrt{2} }{2}

∵ y-coordinate = \frac{\sqrt{2} }{2}

∴ sinФ = \frac{\sqrt{2} }{2}

- cotФ is the reciprocal of tanФ

∵ tanФ = sinФ ÷ cosФ

∴ cotФ = cosФ ÷ sinФ

∴ cotФ = \frac{-\sqrt{2} }{2} ÷ \frac{\sqrt{2} }{2}

∴ cotФ = -1

The values of cosine Ф and cotangent Ф are \frac{-\sqrt{2} }{2} and -1

Learn more:

You can learn more about the trigonometry function in brainly.com/question/4924817

#LearnwithBrainly

4 0
3 years ago
Read 2 more answers
For a science project, 3/4 of the students chose to make a poster and 0.25 of the students wrote a report. Rosa said that more s
Viktor [21]
She’s right because .25 converted into a fraction is 1/4 and 3/4 is greater than 1/4
3 0
3 years ago
How many solutions are there to the equation below 15x+11=8x
Svetradugi [14.3K]

Answer:

There is one solution

Step-by-step explanation:

15x+11=8x

Subtract 15x from each side

15x-15x +11 = 8x-15x

11 = -7x

Divide by -7

11/-7 = -7x/-7

-11/7 =x

There is one solution

8 0
3 years ago
Read 2 more answers
Other questions:
  • 4 cubes high 4 cubes long and 2 cubes wide how many cubes you need to make a prism
    11·1 answer
  • -6x+6y=6<br> -6x+3y=-12<br><br> Solving system of equations by elimination
    14·1 answer
  • At 5:00 pm sandra jean read a temperature of 42°f what was the temperature after it changed -6 degrees
    14·1 answer
  • Find x when F(x)=10<br><br> f(x)=2x-6
    8·2 answers
  • Find f when 27f=81 f=
    5·1 answer
  • Can -6/10 be reduced
    13·2 answers
  • one pound of swordfish costs as much as 1.5 pounds of salmon. Mrs Ortiz pays $39 for 2 pounds of salmon and 3 pounds of swordfis
    12·2 answers
  • (+5)+(-2)+(+20)<br> solve
    9·2 answers
  • A clothing store is offering two coupons. one is for $50 off your purchase and the other is for 30% off your purchase. If the to
    11·1 answer
  • Which of the following is an exponential function y=x^1/2 y=2x^3 y=3^x
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!