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Aleksandr-060686 [28]
3 years ago
5

From the sum of 3a²-a-3 and 2a-9,subtract a²-3a-7

Mathematics
1 answer:
ANEK [815]3 years ago
8 0
The sum of 3a²-a-3 and 2a-9 is 3a²+a-12

3a²+a-12 - (a²-3a-7) = 3a²+a-12 - a² + 3a + 7 = 

2a² +4a - 5
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Absolute value equations please help!!!!
Leona [35]

Answer:

#3×|x-9|=0

|x-9|=0

X-9=0

X=9

# |2x-9|-4=2

|2x-9|=2+4

|2x-9|=6

2x-9=6

2x=9=-6

X=15/2

X=3/2

1 to x power =3/2 or

2 to x power =15/2

Step-by-step explanation:

Hope I helped u

4 0
3 years ago
How do i solve this -6n-20=2n+4(1-3n)
Leno4ka [110]
Hi Ivan

-6n - 20 = 2n + 4(1 - 3n)
-6n - 20 = 2n + 4 - 12n
Combine like terms
-6n - 20 = 2n - 12n + 4
-6n - 20 = -10n + 4
-6n + 10n = 4 + 20
4n = 24
n = 24/4
n= 6

I hope that's help! If you have any further questions please let me know !
3 0
3 years ago
A student drops a penny of a house that is 16 feet tall if the equation of height as a function is h(t)= -16t2 + initial height
Molodets [167]

Answer:

it will take 3.5 seconds

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
I need help finding the value
siniylev [52]

Answer:

17

Step-by-step explanation:

First, we notice that the triangle is isosceles . (In case you didn't know, the two tick marks on the sides of the triangle signify that they are congruent and have the same length.) Since the triangle is isosceles, we can apply the Base Angles Theorem.

The Base Angle Theorem states that the two angles opposite of the two congruent sides are also congruent. In this case, we can say that, because the angle measuring 29° and the third(top) angle are opposite to the two congruent sides, those two angles are congruent. Therefore, the third angle measures 29° as well.

Now that we know this, we can write the following equation:

29°+29°+(11x-65)° = 180.

Solving this equation, we have x = 17.

Hope this helps!

5 0
3 years ago
10 points
Damm [24]

She did not simplify under the square root correctly.

<h3>Quadratic equation</h3>

Given the quadratic expression

5x^2 - 6x - 8 = 0

Using the general formula, we will have:

x =\frac{-b\pm \sqrt{b^2-4ac}}{2a}

From the given equation;

a = 5

b  -6

c = -8

Substitute the values into the formula to have:

x =\frac{6\pm \sqrt{6^2-4(5)(-8)}}{2(5)}\\ x =\frac{6\pm \sqrt{36+120}}{10}\\x =\frac{6\pm 12.49}{10}\\

From the given solution, we can see that she did not simplify under the square root correctly.

Learn more on general formula here; brainly.com/question/21466038

5 0
2 years ago
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