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2 years ago

What percent of 28 equals 21?

1 answer:

Taya2010 [7]2 years ago

5 0

21 is to 75 as 7 is to 25 . We can now change 25 to 100 by multiplying by 4 . Therefore , on also multiplying 7 by 4: 21 is 28% of 75

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Are all quadrilaterals either rectangles or squares?

Greeley [361]

No, there are lots of quadrilaterals. Examples of other quadrilaterals are rhombus, kite, trapezoid, parallelogram etc

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2 years ago

Lorne subtracted 6x3 – 2x + 3 from –3x3 + 5x2 + 4x – 7. Use the drop-down menus to identify the steps Lorne used to find the dif

Novay_Z [31]

Answer: Step 1: Reverse the signs of $6x^3-2x + 3$ expression.

Step 2: Removing parenthesis

Step 3: Grouping like terms

Step 4: Combing like terms

Step 5: Writing the final expression in standard form

Step-by-step explanation: First expression : $6x^3-2x + 3$

Second expression : $-3x^3+5x^2+4x-7$ .

We need to subtract $6x^3-2x + 3$ from $-3x^3+5x^2+4x-7$ .

Step 1: Reverse the signs of $6x^3-2x + 3$ expression.

$(-3x^3+5x^2+4x-7)+(-6x3+2x-3)$

Step 2: Removing parenthesis

$(-3x^3) +5x^2+4x + (-7) + (-6x^3) + 2x + (-3)$

Step 3: Grouping like terms

$[-3x^3) + (-6x^3)] + [4x + 2x] + [(-7) + (-3)] + [5x^2]$

Step 4: Combing like terms

$-9x^3 + 6x + (-10) + 5x^2$

Step 5: Writing the final expression in standard form

$-9x^3 + 5x^2 + 6x-10$

8 0

2 years ago

Read 2 more answers

What is 5x+1 divided by x^2-9

Andrej [43]

X=2 is the answer hope it helps

6 0

2 years ago

Read 2 more answers

For the formula F = 95K – 455.67, what is the value of K when F = 0?

Inessa [10]

Answer:

K = 4.8

Step-by-step explanation:

Equation Solving

We are given the equation:

F = 95K - 455.67

We are required to find the value of K when F=0:

95K - 455.67 = 0

Adding 455.67:

95K = 455.67

Dividing by 95;

K = 4.8

4 0

2 years ago

What is the value of the x?

Ronch [10]

Answer:

Step-by-step explanation:

37+90=127

180-127=53

7 0

2 years ago