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stira [4]
3 years ago
6

Solve the system by elimination -6x + 6y = 0 9x - 8y = 4

Mathematics
1 answer:
Art [367]3 years ago
4 0

Answer:

x=4, y=4

Step-by-step explanation:

X=(4+8y)/9

-6×(4+8y)/9 +6y=0

-2×(4+8y)/3+ 6y=0

-2×(4+8y) + 18y =0

-8-16y+18y=0

2y=8

y=4

-6x+6×4=0

-6x=-24

x=4

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If x is an integer, then is -x positive?
Andrei [34K]

Answer:

If x is an integer, then for values of x ≤ 0 would -x be positive.

General Formulas and Concepts:

<u>Math</u>

  • Integers

Step-by-step explanation:

We know that integers comprise of the number line from -∞ to ∞. We can have numbers like -3, -2, -1, 0, 1, 2 ,3.

If we say that x is an integer, and that -x must be positive, then that means the integer x must be negative, because a negative times a negative is a positive.

∴ x can only be negative integers, thus giving us x ≤ 0.

3 0
3 years ago
Can someone please be generous &amp; help I’ve been struggling all night
Alchen [17]

Answer:

Slope-intercept

y = 3/4(x) - 7

Point slope

y -5= 3/4(x - 16)

Step-by-step explanation:

In slope-intercept

We have the general slope intercept as;

y = mx + b

where m is the slope and b is the y-intercept

in this case, m = 3/4 and b = -7

So we have;

y = 3/4(x) - 7

In point-slope

we have the general form as;

y-y1 = m(x-x1)

So what we have is as follows;

y -5= 3/4(x - 16)

Where we have (x1,y1) = (16,5)

3 0
4 years ago
PLEASE HELP
Firdavs [7]
Answer: 2.25 grams

Explanation:

To find the remaining mass of an element, apply the following:

m0 = m/(2^n), where m0 is the remaining mass, m as the original mass and n as the number of half lives that have passed.

we have m, we just have to find n. To find n,

24/6 = 4 half lives have passed.

Applying the first formula,

m0 = (36)/(2^4) = 36/8 = 2.25 grams

Hope this helps, brainliest would be appreciated :)
4 0
3 years ago
Matt is showing his work in simplifying (6.2 − 1.6) − 4.4 + 7.8. Identify any error in his work or reasoning. Step 1: (6.2 − 1.6
Eduardwww [97]

Formatting first:


Step 1: (6.2 − 1.6) − 4.4 + 7.8

Step 2: 6.2 + (− 1.6 − 4.4) + 7.8 (commutative property)

Step 3: 6.2 − 6 + 7.8

Step 4: −14 − 6 = 8 (commutative property)

Step 5: 14 − 6 = 8


Step 2 is the associative property (a+b)+c=a+(b+c)

Step 4 is just wrong with -14 instead of 14; seems corrected in step 5.


Answer: He wrote commutative instead of associative in Step 2.


3 0
3 years ago
Chloe invests money in an account paying simple interest. She invests $200 and no money is added or removed from the investment.
MissTica

Answer:

2%

Step-by-step explanation:

Chloe's simple interest for 1 year is $4. You can get this by subtracting the amount she invested from the total amount she got after one year.

  • $204 - $200 = $4

Now that we know the simple interest, we can now get the simple interest rate or<em> simple percent interest per year </em>by dividing $4 by $200.

  • $4 ÷ $200 = 0.02

Let's change 0.02 into a percentage.

  • 0.02 x 100 = 2%

This means that every year, her investment will earn a <em>2% simple interest.</em>

6 0
3 years ago
Read 2 more answers
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