MATHEMATICS MIDDLE SCHOOL

Colin and Brian were playing darts. Colin scored 139. Brian scored 53 more than Colin. What was their combined score?

Answers

Answer 1
Answer:

Answer:

192

Step-by-step explanation:

Its nothing complicated just add their scores together.
Answer 2
Answer:

Answer:

331

Step-by-step explanation:

139 + 53 = 192

C = 139

B = 192

139 + 192 = 331

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The rectangle has an area of 4(x+3) square units.A- If the dimensions of the rectangle are doubled, what is the area of the new rectangle in terms of x? Show your work.


B- Will the ratio of the area of the original rectangle to the area of the larger rectangle be the same for any positive value of x? Explain.

Answers

Suppose there is a rectangle with a width and length of x and y. The area would be xy.

A rectangle with width and length 2x and 2y would have an area of 4xy.

In essence, when you multiply the lengths by 2, the area multiplies by 2 SQUARED.

4(4(x+3)) = 16(x+3).

The ratio will be the same for any value of x because the area is still being multiplied by the same 2².

I live on the 15th floor of an apartment building. My friend, Emily, comes to visit me every Saturday. Last year she would always ride the elevator to the 7th floor and walk up the rest of the way. This year she rides the elevator to the 9th floor and the walks the rest of the way. Why does she do this? (Additional clue: On rainy days she rides the elevator all the way up to the 15th floor).Help Please

Answers

She probably does that for exercise. So, she gets to the level that she wants, and she gets more exercise so she gets there faster.
Because she wants to walk and keep fit. Maybe she gets tired walking 8 floors so this year she prefers to walk 6 floors.

How u solve this problem
7x-y=6 -7x+y=-6

Answers

\underline{+\left\{\begin{array}{ccc}7x-y=6\n-7x+y=-6\end{array}\right}\qquad\text{add both sides of the equations}\n.\qquad\qquad0=0\n\n\text{Infinitely many solutions}\n\n\left\{\begin{array}{ccc}x\in\mathbb{R}\ny=7x-6\end{array}\right

How to solve -10p+9p=12

Answers

we add like terms
to understand this user the distributive property in reverse like this
ab+ac=a(b+c) so we have
-10p+9p=(-10+9)p
we add the terms in the parenthsees
-10+9=9-10=-1
so we have
-1p=12
multiply both sides by -1
p=-12
-10p+9p= 12
⇒ (-10+9)*p= 12 (distributive property)
⇒ -1*p= 12
⇒ -p= 12
⇒ p= -12

Final answer: p=-12~

Pansy measured the height of a window frame as 5.12 feet, but the actual height was 6 feet. What is the percentage of error in Pansy's measurement?A: 6.82
B: 6.88
C: 14.67
D: 11.12

Answers

The percentage error of the height of the table is: C. 14.67

Recall:

  • Percentage error can be calculated using the formula: (what was measured - the actual measurement) / actual measurement × 100%.

Thus:

The height that was measured = 5.12 feet

Actual measurement of the height = 6 feet

Percentage error = (6 - 5.12) / 6 × 100

Percentage error = 14.67

Learn more about percentage error here:

brainly.com/question/5493941
Percent error=100*(measurement-actual dimension)/actual dimension

pe=100(5.12-6)/6=-14.67%

So there is a 14.67% error.

$5 is what percent of $20

Answers

$5 is 25% of of $20.
Because we know that $10 is 50% of $20 ( 10 is a half of 20 ) and $5 is 1/4 of $20. 
We also that 1/4 is 25% so,
$5 is 25% 
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