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Sonbull [250]
3 years ago
5

7 – 4 (3a – 5) I NED HLP ASAP. I WILL TRY BRAINLIEST TO FIRST ANSWER. EXPLANATION ALSO NEEDED

Mathematics
1 answer:
Lina20 [59]3 years ago
6 0

The answer is a = 2.25.

Simplifying

7 + -4(3a + -5) = 0

Reorder the terms:

7 + -4(-5 + 3a) = 0

7 + (-5 * -4 + 3a * -4) = 0

7 + (20 + -12a) = 0

Combine like terms: 7 + 20 = 27

27 + -12a = 0

Solving

27 + -12a = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-27' to each side of the equation.

27 + -27 + -12a = 0 + -27

Combine like terms: 27 + -27 = 0

0 + -12a = 0 + -27

-12a = 0 + -27

Combine like terms: 0 + -27 = -27

-12a = -27

Divide each side by '-12'.

a = 2.25

Simplifying

a = 2.25

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alisha [4.7K]
The answer would be D

3 0
2 years ago
Write the equation of the parabola in vertex form with vertex at (2,-5) and y intercept at -17.
jok3333 [9.3K]
<h3>Answer:</h3>

y = -3(x -2)² -5

<h3>Explanation:</h3>

The equation of a parabola with vertex (h, k) is given by ...

... y = a(x -h)² +k . . . . . . . for some vertical scale factor "a".

We can find the value of "a" by substituting the coordinates of a point that is not the vertex. Here, that point is the y-intercept: (0, -17).

... y = a(x -2)² -5 . . . . . initial form of the equation for the parabola

... -17 = a(-2)² -5 . . . . . substitute y-intercept values

... -12 = 4a . . . . . . . . . . add 5, simplify

... -12/4 = a = -3

The desired equation is ... y = -3(x -2)² -5.

4 0
3 years ago
Will give brainliest :D
klemol [59]

Answer:

D.

Step-by-step explanation:

Pretty sure

6 0
3 years ago
5 x 10^4 divided by 2.5 x 10^2
larisa86 [58]

Answer:

200

Step-by-step explanation:

Put 5 times 10^4 in your calculator and you get 50,000. Then put 2.5 times 10^2 in your calculator and you get 250. Lastly divide 50,000 and 250 and you get 200.

7 0
3 years ago
Read 2 more answers
Please help me it’s due!!
Eddi Din [679]

Answer:

h=12 meters

Step-by-step explanation:

h/16=9/12

12h=144

h=12

5 0
3 years ago
Read 2 more answers
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