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
SashulF [63]
3 years ago
13

May anyone help me with this?

Mathematics
1 answer:
Verdich [7]3 years ago
5 0

Answer:

31

Step-by-step explanation:

You might be interested in
Find the unit rate. 12 laps in 30minutes. <br> Asking for fraction
11Alexandr11 [23.1K]

Answer:

4/10 maybe cuz 12 divided by 30 is 0.4 and 0.4 would be 4/10

7 0
3 years ago
ALGEBRAIC EXPRESSION 11. Subtract the sum of 13x – 4y + 7z and – 6z + 6x + 3y from the sum of 6x – 4y – 4z and 2x + 4y – 7. 12.
Naily [24]

Answer:

Explained below.

Step-by-step explanation:

(11)

Subtract the sum of (13x - 4y + 7z) and (- 6z + 6x + 3y) from the sum of (6x - 4y - 4z) and (2x + 4y - 7z).

[(6x - 4y - 4z) +(2x + 4y - 7z)]-[(13x - 4y + 7z) + (- 6z + 6x + 3y) ]\\=[6x-4y-4z+2x+4y-7z]-[13x-4y+7z-6z+6x+3y]\\=6x-4y-4z+2x+4y-7z-13x+4y-7z+6z-6x-3y\\=(6x+2x-13x-6x)+(4y-4y+4y-3y)-(4z+7z+7z-6z)\\=-11x+y-12z

Thus, the final expression is (-11x + y - 12z).

(12)

From the sum of (x² + 3y² - 6xy), (2x² - y² + 8xy), (y² + 8) and (x² - 3xy) subtract (-3x² + 4y² - xy + x - y + 3).

[(x^{2} + 3y^{2} - 6xy)+(2x^{2} - y^{2} + 8xy)+(y^{2} + 8)+(x^{2} - 3xy)] - [-3x^{2} + 4y^{2} - xy + x - y + 3]\\=[x^{2} + 3y^{2} - 6xy+2x^{2} - y^{2} + 8xy+y^{2} + 8+x^{2} - 3xy]- [-3x^{2} + 4y^{2} - xy + x - y + 3]\\=[4x^{2}+3y^{2}-xy+8]-[-3x^{2} + 4y^{2} - xy + x - y + 3]\\=4x^{2}+3y^{2}-xy+8+3x^{2}-4y^{2}+xy-x+y-3\\=7x^{2}-y^{2}-x+y+5

Thus, the final expression is (7x² - y² - x + y + 5).

(13)

What should be subtracted from (x² – xy + y² – x + y + 3) to obtain (-x²+ 3y²- 4xy + 1)?

A=(x^{2} - xy + y^{2} - x + y + 3) - (-x^{2}+ 3y^{2}- 4xy + 1)\\=x^{2} - xy + y^{2} - x + y + 3 +x^{2}- 3y^{2}+ 4xy -1\\=2x^{2}-2y^{2}+3xy-x+y+2

Thus, the expression is (2x² - 2y² + 3xy - x + y + 2).

(14)

What should be added to (xy – 3yz + 4zx) to get (4xy – 3zx + 4yz + 7)?

A=(4xy-3zx + 4yz + 7)-(xy - 3yz + 4zx) \\=4xy-3zx + 4yz + 7 -xy + 3yz - 4zx\\=3xy-7zx+7yz+7

Thus, the expression is (3xy - 7zx + 7yz + 7).

(15)

How much is (x² − 2xy + 3y²) less than (2x² − 3y² + xy)?

A=(2x^{2} - 3y^{2} + xy)-(x^{2} - 2xy + 3y^{2})\\=2x^{2} - 3y^{2} + xy-x^{2} + 2xy - 3y^{2}\\=x^{2}-6y^{2}+3xy

Thus, the expression is (x² - 6y² + 3xy).

7 0
3 years ago
What values of b satisfy 4(3b + 2)2 = 64?
Vikentia [17]
Given the equation 4(3b + 2)² = 64, dividing both sides of the equation by 4, we have (3b + 2)² = 16 and getting the square root of both sides, (3b + 2) = 4 and (3b + 2) = -4 We can solve for b for each equation and have 3b = 2 | 3b = -6 b = 2/3 | b = -2 Therefore, the values of b are 2/3 and -2 and from the choices, the answer is <span>A: b = 2/3 and b = -2.</span>
8 0
3 years ago
11/10=n/14 Please solve this will give brainliest for the correct answer
Talja [164]

\text{ Hi there! =)}

\large\boxed{n = 15.4}

\frac{11}{10} =\frac{n}{14} \\\\\text{ Cross multiply to solve for n:}\\\\11 * 14 = 10 * n\\\\154 = 10n\\\\n = 15.4

8 0
2 years ago
Three is less than the sum of a number x and 4.
jeyben [28]

Answer:

3 < x+4

Step-by-step explanation:

The less than symbol is <

3 is less than the sum ( add) of x and 4

3 < x+4

Solving

Subtract 4 from each side

3-4 < x+4-4

-1 <x

8 0
3 years ago
Other questions:
  • 15 more than 3 times a number is at most 7
    7·1 answer
  • 12. Complete the comparison: 3+7&gt;?<br> O A. 7 + 3<br> O B. 9 + 4<br> O C. 10-2<br> O D. 8 +2.
    13·2 answers
  • Ray Cupple bought a basic car costing $10,150.00, with options costing $738.00. There is a 6% sales tax in his state and a combi
    10·1 answer
  • What is a nonlinear function
    5·2 answers
  • If (-2, -6) is the end point of the line segment and (3,0) is its midpoint , Find the other endpoint ?
    7·1 answer
  • Perform the indicated operation<br>7+9+(4)<br>20<br>20<br>O12<br>O-12​
    15·1 answer
  • If there is 4 apple trees for every three pear trees but for every 2 avocado trees there is 5 pear trees she is planning to plan
    8·1 answer
  • How do you explain this function?
    5·1 answer
  • Help pls!! Which statement is true of the transformation from triangle ABC to triangle A’ B’ C’ ?
    13·1 answer
  • Find the value of -8 - 12 - (-20).<br> 24<br> 16<br> -40<br> 0
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!