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oksian1 [2.3K]
2 years ago
15

Select the statement that describes the expression 5 x (8 − 5) ÷ 3.

Mathematics
1 answer:
lys-0071 [83]2 years ago
8 0

Step-by-step explanation:

Substitution: ‘Find the value of 2x + 3 if x = 4.’ In this case the pronumeral is given the value 4.

Solving an equation: ‘Find x if 2x + 3 = 8.’ Here we are seeking the value of the pronumeral that makes the sentence true.

Identity: ‘The statement of the commutative law: a + b = b + a.’ Here a and b can be any real numbers.

Formula: ‘The area of a rectangle is A = lw.‘ Here the values of the pronumerals are connected by the formula.

Equation of a line or curve: ‘The general equation of the straight line is y = mx + c.’

Here m and c are parameters. That is, for a particular straight line, m and c are fixed.

In some languages other than English, one distinguishes between ‘variables’ in functions and ‘unknown quantities’ in equations (‘incógnita’ in Portuguese/Spanish, ‘inconnue’ in French) but this does not completely clarify the situation. The terms such as variable and parameter cannot be precisely defined at this stage and are best left to be introduced later in the development of algebra.

An algebraic expression is an expression involving numbers, parentheses, operation signs and pronumerals that becomes a number when numbers are substituted for the pronumerals. For example 2x + 5 is an expression but +) × is not.

Examples of algebraic expressions are:

3x + 1 and 5(x2 + 3x)

As discussed later in this module the multiplication sign is omitted between letters and between a number and a letter. Thus substituting x = 2 gives

3x + 1 = 3 × 2 + 1 = 7 and 5(x2 + 3x) = 5(22 + 3 × 2) = 30.

In this module, the emphasis is on expressions, and on the connection to the arithmetic that students have already met with whole numbers and fractions. The values of the pronumerals will therefore be restricted to the whole numbers and non-negative fractions.

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a butterfly flies 1/2 of a foot in 5/6 of a minute (a) how far will the butterfly travel in one minute
Westkost [7]

If you divide them together then you get the answer which is 10/6 or 5/3


6 0
3 years ago
The vertices of a square are A(–2, 4), B(4, 4), C(4, –2), and D(–2, –2). The diagonals of the square intersect at their midpoint
sertanlavr [38]
A(–2, 4), B(4, 4), C(4, –2), D(–2, –2)
-> select some diagonal: AC
midpoint is at A+(1/2)*AC

-> calculate vector AC:
AC=(4-(-2),-2-4)=(6,-6)
-> calculate half length of AC:
(1/2)*AC=(3,-3)

A+(1/2)*AC=
(-2,4)+(3,-3)=(1,1) which is the midpoint

so the first option is correct
4 0
2 years ago
A homeowner wants to insulate the new recreation room in her basement. She has been told that 3' of insulation would do the job.
Westkost [7]

Answer:

6 rolls

Step-by-step explanation:

Data provided in the question:

Height of wall = 9'

Width of walls = 13', 13', 18' and 18'

Dimension of roll = 3' x 2' x 50'

Now,

Total area of the walls = 9' × 13' + 9' × 13' + 9' × 18' + 9' × 18'

= 117 + 117 + 162 + 162

= 558 ft²

Area of each roll = 2' × 50'

= 100 ft²

Thus,

Number of rolls required = [ Total area of the walls  ] ÷ [ Area of each roll ]

= 558 ft² ÷ 100 ft²

= 5.58 ≈ 6 rolls

3 0
2 years ago
Simplify the following polynomial expression. A. B. C. D. <br> (5x^4-9x^3+7x-1)
jek_recluse [69]

Answer:

The answer to the expression (5x^4-9x^3+7x-1) = -98

Step-by-step explanation:

4 0
3 years ago
Please help<br> I would really appreciate it
vlabodo [156]

Answer:

Percentage Change Formula

Step-by-step explanation:

Percent change can be applied to any quantity you measure over time. If the price increased use the formula

((New Price - Old Price) / Old Price) × 100

If the price decreased flip the first part to

((Old price - new price)

and then follow the rest of the formula.

8 0
2 years ago
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