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Hunter-Best [27]
2 years ago
6

Add −3x2y2z2+12xyz2+7xyz and 10xyz−10xyz2

Mathematics
1 answer:
Andre45 [30]2 years ago
6 0

Answer:

3xyz

Step-by-step explanation:

The required sum = 7xyz+(−5xyz)+9xyz+(−8xyz)

=7xyz–5xyz+9xyz–8xyz

=(7–5+9–8)xyz

=(16–13)xyz

=3xyz

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What number must be added to the expression for it to equal zero? (–6.89 + 14.52) + (–14.52)
kobusy [5.1K]

Answer:

The number to be added is 6.89

Step-by-step explanation:

Here, we want to know what number must be added to the expression to make it equal to zero.

Let the number be x

Thus;

-6.89 + 14.52 -14.52 + x = 0

-6.89 + x = 0

x = 6.89

6 0
3 years ago
I’ll make brainlest. help asap pls
Liono4ka [1.6K]

Answer:

(2, -1)

Step-by-step explanation:

We can add the first equation by the second

(4x + 6y = 2)+(-4x + 4y = -12)=

10y=-10

we divide both sides by 10 to get

y=-1

We plug -1 in the second equation to get:

-4x+4(-1)=-12

-4x-4=-12

-4x=-8

Now, we divide both sides by -4

x=2

Hope this helps!

6 0
2 years ago
Blueberries are on sale for $2.80 per pint. The regular price is $3.50 per pint. What is the percent of decrease?
maks197457 [2]
The answer is 7% because the sale amount was .70 cents.
3 0
2 years ago
Can you just give me answers
sammy [17]

Answer:

to what

Step-by-step explanation:

5 0
3 years ago
Solve 6x+57=2x+315 . A. x=−911 B. x=911 C. x=119 D. x=−119
liubo4ka [24]

Explanation:

Remember: we have to isolate the variable x, so that means we have to get x by itself.

Step 1:

Let’s look at our equation:

6x+57=2x+315

Let’s subtract 2x from both sides of the equation, since our goal is to isolate the variable. You could also subtract 6x from both sides, but you would end up with a negative number, and I find it easier to deal with positive numbers.

6x(-2x)+57=2x(-2x)+315\\4x+57=315

Step 2:

Now, let’s subtract 57 from both sides of our equation.

4x+57(-57)=315(-57)\\4x=258

Step 3:

Since we have to isolate x, let’s divide both sides of the equation by 4.

4x/4=x\\258/4=64.5

Our final answer: x = 64.5

None of your options is the correct answer. Notify your teacher, tutor, etc. since there none of the options are correct.

4 0
3 years ago
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