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ioda
3 years ago
9

Help plzzzzzz plz help this ? is realy hard Simplify the expression 7(a−3+4b).

Mathematics
2 answers:
nikitadnepr [17]3 years ago
8 0

Use the distributive property to multiply the 7 by each term inside the parentheses.

7(a - 3 + 4b) =

= 7 * a - 7 * 3 + 7 * 4b

= 7a - 21 + 28b

Answer: 7a - 21 + 28b

velikii [3]3 years ago
4 0

7(a−3+4b)

distribute

7a-7*3+7*4b

7a-21+28b

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512/2 simplified fraction form
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Step-by-step explanation:

\frac{512}{2}  \\  \\  \frac{201}{1}

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3 years ago
Matrix a is a 6 × 5 matrix. which order of matrix can be multiplied by matrix a to create matrix ab?
mezya [45]

Order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

<h3>What is a matrix?</h3>
  • A matrix is a rectangular array or table of numbers, symbols, or expressions that are organized in rows and columns to represent a mathematical object or an attribute of such an object in mathematics.
  • For instance, consider a matrix with two rows and three columns.

To find the order of matrix:

  • We must first check the dimension of two matrices, say matrix A by matrix B, before we may multiply them.
  • Multiplication is achievable if the number of columns in the first matrix, A, equals the number of rows in the second matrix.
  • Dimension is assigned to the provided matrix: 6 × 5
  • This means the given matrix contains six rows and five columns.
  • As a result, the second matrix MUST have 5 rows in order for multiplication to be POSSIBLE.
  • The only matrix with 5 rows among the above alternatives is the matrix with dimension (B) 5 × 6.

To prove:

  • In other words, the inner products of the dimensions should be equal.
  • That is; (a × b)(b × a) is possible but (a ×b)(c × b) is impossible.
  • The dimensions of the matrix are given by, row × column.

Therefore, order (B) 5 × 6 of the matrix can be multiplied by matrix a to create matrix ab.

Know more about matrix here:

brainly.com/question/24079385

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7 0
2 years ago
1. A scientist is growing cell cultures and examining the effects of various substances on them as part of his research. The cul
kompoz [17]

Pay attention in class

7 0
3 years ago
The median starting salary for new law school graduates is determined by
Elena-2011 [213]

Step-by-step explanation:

1) we would have the expectation that b₅ < 0 because b₅ shows how salary responds to law school ranking. As the rank of law school increases then median starting salary for new law school graduates declines. there is an inverse relation between salary and rank, Coefficient of rank, b5 will be negative since it is less than 0

ii) B₁ is going to be positive because as median LSAT score for the graduating class goes up, so does the salary of graduates. we have B1 >0

B₂ will be positive as college median GPA rises, so does graduate salary.

B₃ will be positive because if the more volumes of book in library, the greater possibility of getting higher salary, so B₃ >0.

B₄ >0 as if annual cost is high , then there would be indictaes more facilities of learning for students, leading to more chances of high salaries , hence B4 >0.

B5<0 this has been explained in 1.

iii) predicted ceteris paribus difference in salary for schools with a median GPA different by one point

= coefficient of GPA

=0.248

= this 24.8% in percentages B₂ tells us that when other factors are held constant,increasing median gpa by 1 would cause 24.8 percent increase in salary predicted.

iv)holding other variable factors constant, increasing the volume in the law library would bring about predicted salary increase by 0.095%

v) due to the inverse relationship between rank of law school and salary, it is better to attend a law school with lower rank than that with higher rank

difference in ranking of 20 = 20*(-0.0033)

= -0.066  x 100

= -6.6%

if rank is lower by 20 units , then we will have salary to be 6.6% higher

8 0
3 years ago
How do you turn a fahrenheit to kelvins??
yulyashka [42]
Using the following equation is how you translate degrees Fahrenheit to Kelvin:

Kelvin = (Fahrenheit + 459.67) * 5 / 9<span> 

or you could use: 
</span>
Kelvin = (Fahrenheit - 32) * 5 / 9 + 273.15<span> </span>
6 0
3 years ago
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