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Grace [21]
3 years ago
12

A. X - y = 3 2x - 4y = 8 Given ordered pair: (2,-1).

Mathematics
1 answer:
Studentka2010 [4]3 years ago
7 0

Answer:

X-y=3. 2x-2y=6. 2y=-2

Y= -1

2x-4y=8. 2x-4y=8 2.x-4.-1=8

2x=4. x=2

Step-by-step explanation:

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Sandra is 4 feet tall. Pablo is 10% taller than Sandra and Michaels is 8% taller than Pablo. What is Michael height in feet
taurus [48]


We first calculate  Pablo's height .

4 = 100%

x = 1%  (Where x is 1% of  Sandra's height.)

cross multiplying the equation, we get:

100x = 4 →  x = 4/100  → x = 0.04

If 1% = 0.04, then 10%  will be 0.04 × 10 = 0.4

Pablo's height is 4 + 0.4 =  4.4 feet.

Now we repeat the above steps to get Michal's height from Pablo's height

4.4 = 100%

x =  1%       so:

100x = 4.4 → x = 4.4/ 100 → x = 0.044

If 1% = 0.044, then 8% will be 0.044 × 8 = 0.35

Michael's height is  4.4 + 0.35 = 4.75 feet.

     



5 0
3 years ago
I need help please will mark brainliest
Simora [160]

Answer:

4 horses maybe

Step-by-step explanation:

you might subtract the 4 horses from the left to get 8 horses in the right but that's equal to 2 elephants so divide 8 by 2 to get the 1 elephant so 4 maybe

4 0
3 years ago
Read 2 more answers
PLEASE HELP QUESTION IN PICTURE
sp2606 [1]

Answer:

b = 55

d = 55

Step-by-step explanation:

Part B:

1. We can see that m∠C (25 degrees), the angle with 100 degrees, and ∠B are adjacent angles that add up to 180 degrees.

  • This means that b + 25 + 100 = 180

2. (Solving equation above)

Step 1: Simplify both sides of the equation.

  • b + (25+100)=180
  • b + 125 = 180

Step 2: Subtract 125 from both sides.

  • b + 125 - 125 = 180 - 125
  • b = 55

Therefore, b = 55.

Part D:

1. The exterior angle theorem states that the exterior angle of a triangle is congruent to the sum of the two opposing interior angles.

  • This means that 110 = d + 55

2. (Solving)

Step 1: Subtract 55 from both sides.

  • 110-55 = d + 55-55
  • 55 = d

Therefore, d = 55.

5 0
2 years ago
Andrew is showing his work in simplifying −4.5 + 4.2 + 5.6 − 7.3. Identify any errors in his work or in his reasoning.
julia-pushkina [17]

Answer:

  • D. Step 5

Step-by-step explanation:

Andrew made a mistake at last step.

<u>It should be:</u>

  • -11.8 + 9.8 = 9.8 - 11.8 = -2 but not -21.6
6 0
3 years ago
Jacks plant grew 50 inches in 100 weeks at this rate how much did it grow in 210 days
denpristay [2]
210 days* (1 week/ 7 days)* (50 inches/ 100 weeks)= 15 inches.
(Note that the units cancel out so you get the answer)

Final answer: 15 inches~
3 0
3 years ago
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