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alexira [117]
3 years ago
14

(THIS IS 6TH GRADE MATH) I need help on number 7 and 10​

Mathematics
2 answers:
leonid [27]3 years ago
4 0
For number 7 I got 5(-n5
Lunna [17]3 years ago
3 0
I can’t really see number 7 but for number 10 the answer is 13x - 4y=8
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The width of a rectangular field is 20 feet less than its length. The area of the field is 12,000 ft? What is the length of the
Scilla [17]

Answer:

The answer is 120 feet.

Step-by-step explanation:

The area of the field (A) is:

A = w · l       (w - width, l - length)

It is known:

A = 12,000 ft²

l = w - 20

So, let's replace this in the formula for the area of the field:

12,000 = w · (w - 20)

12,000 = w² - 20

⇒ w² - 20w - 12,000 = 0

This is quadratic equation. Based on the quadratic formula:

ax² + bx + c = 0      ⇒  

In the equation w² - 20w - 12,000 = 0, a = 1, b = -20, c = -12000

Thus:

So, width w can be either

or

Since, the width cannot be a negative number, the width of the field is 120 feet.

6 0
2 years ago
Read 2 more answers
16. Two golfers completed one round of golf. The first golfer had a score
bearhunter [10]

9514 1404 393

Answer:

  9

Step-by-step explanation:

The extra shots can be computed from the difference in their scores:

  6 -(-3) = 6 +3 = 9

The first golfer took 9 more shots.

6 0
2 years ago
What is nine times for a total loss of 15 3/4 yards
love history [14]
Try feet /cm or inches 
7 0
3 years ago
3.920 * (1.018)^x = 5.500<br><br>X=?​
Andrei [34K]

Answer:

19

Step-by-step explanation:

3.920(1.018)ˣ = 5.500

  • First we can divide both sides by 3.920 to get: (1.108)ˣ = 1.403
  • Then we can take the natural log of both sides to get: ln[(1.108)ˣ] = ln(1.403)
  • We can then use logarithmic rules to move the x exponent to the front: xln(1.108) = ln(1.403)
  • Then we can divide both sides by ln(1.108) to get: x=\frac{ln(1.403)}{ln(1.018)}
  • Then using a calculator we get x = 18.98 ≈19
5 0
3 years ago
Four times the difference of 17 and a number is 84. Which equation below can be used to find the unknown number?
Xelga [282]
4(17-n)=84, 17-n means the difference between 17 and a number multi that by 4 so the answer is 4(17-n)=84
6 0
3 years ago
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