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bezimeni [28]
3 years ago
13

2a - 7 - 6a = 9 Pls help?

Mathematics
1 answer:
slavikrds [6]3 years ago
3 0

Step-by-step explanation:

2a - 7 - 6a = 9

- 4a - 7 = 9

- 4a = 16

a = -4

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Every hour of driving uses
xenn [34]

Answer:

45 gallons

Step-by-step explanation:

1 hour = 3 gallons

2 hours = 6 gallons

3 hours = 9 gallons

4 hours = 12 gallons

5 hours = 15 gallons

10 hours = 30 gallons

15 hours = 45 gallons

4 0
3 years ago
Please help me with this question!!
stepladder [879]

Answer:

  1. rational
  2. irrational
  3. irrational
  4. irrational
  5. √7, it is irrational

Step-by-step explanation:

A <em>rational</em> number is one that can be expressed as the ratio of two integers. All fractions that have integer numerators and (non-zero) denominators are <em>rational</em> numbers. Any finite decimal number, or any repeating decimal number, is a rational number. These can always be expressed as the ratio of two integers. For example, 0.4040... = 40/99, and 0.286 = 286/1000.

To make an irrational sum, at least one of the contributors must be irrational. You want an irrational 2-number sum that has 7/8 as one of the contributors. Since 7/8 is rational, the other contributor must be irrational.

__

<u>Step 1</u>. The number 7/8 is <em>rational</em>.

<u>Step 2</u>. The desired sum is <em>irrational</em>.

<u>Step 3</u>. The rule <em>rational + </em><em>irrational</em><em> = irrational</em> applies.

<u>Step 4</u>. An <em>irrational</em> number must be chosen.

Step 5. √7 will produce an irrational sum, because <em>it is irrational</em>.

5 0
3 years ago
Dose anyone know how to help me with this
natima [27]
No srry but you can try asking someone else
4 0
3 years ago
What is the value of y?
sergij07 [2.7K]
Find TU with Pythagorean theorem:
TU=√6²-3²=√36-9=√27=3√3
Now you can find y:
y=√TU²+9²=√27+81=√108=6√3
3 0
3 years ago
Carlos wants to mix granola and cranberries together to make trail mix. Granola costs $3 per pound and cranberries cost $5.50 pe
drek231 [11]
3g+5.50c= $29
If u need more details on how I got the equation just comment below
8 0
3 years ago
Read 2 more answers
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