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taurus [48]
3 years ago
14

Worth a lot of points!

Mathematics
1 answer:
Alla [95]3 years ago
8 0

Answer:

15a² + 21a + 19 = 0

Step-by-step explanation:

Given

(4a + 3)² = (a + 5)(a - 2)

(4a + 3)(4a + 3) = (a + 5)(a - 2 ) ← expand both sides using FOIL

16a² + 24a + 9 = a² + 3a - 10 ( subtract a² + 3a - 10 from both sides )

16a² - a² + 24a - 3a + 9 + 10 = 0 ← collect like terms

15a² + 21a + 19 = 0

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Please help its due today!! yes
Effectus [21]

Answer:

b. 5:3

c. 20:12 or 20 cups of flour and 12 eggs

d. 10 cups of flour

e. 9 eggs

Step-by-step explanation:

b. take one point from each number line and simplify it (example 15:9) and simplify it so you get your ratio of (5:3)

c. our ratio for one batch of cookies is 5:3 so mulitply 4 on both sides to find 4 batches of cookies

d. look at your numberline that represents number of eggs, 6 aligns with the number 10 on the numberline that shows "flour in cups" making your answer 10 cups of flour.

e. same thing as the problem before look at your numberline that shows cups of flour (which in this problem its 15) and see where that aligns on the "number of eggs" numberline above.

4 0
3 years ago
Solve by substitution<br><br>3x - 3y = -6 <br><br> z=-3x-3y+9<br><br> -4x+5y+z=8
Vanyuwa [196]
1. Y= x+2
2. Y=Y
3. E^2 Al^3 ^2 anumbs
4 0
3 years ago
What is 66 2/3% of 39? what steps do i take to get my answer. and 66 2/3 is a mixed number fraction.
gregori [183]
66 2/3
=(66*3+2)/3
=200/3

((200/3)*39)/100
=(7800/117)/100
=78/1.17
=66.7%

not so sure it is right though, but that's what I came up with. hope it helps
3 0
3 years ago
There are 18 oranges in box A and 36 in box B, what is the ratio of box A to box B
Nana76 [90]

Answer:

1 : 2

Step-by-step explanation:

Express the ratio as the number of oranges in each box, that is

box A : box B

= 18 : 36

Simplify the ratio by dividing both parts by 18, thus

ratio = 1 : 2 ← in simplest form

7 0
3 years ago
To speed the process of surveying, surveyors use brass metal plates to record important information. The benchmarks, as they are
Agata [3.3K]

Answer:

Feet Above Sea Level

Step-by-step explanation:

A benchmark is a term in Surveying and Geo informatics, that describes a point of reference established at a known elevation which serves as basis in which other elevation or topographical point can be measured.

Therefore, when determining the benchmark, it's height is calculated relative to the vertical datum of the area, typically mean sea level, which is then recorded in FEET ABOVE SEA LEVEL.

Hence, Benchmarks measurements refer to FEET ABOVE SEA LEVEL.

5 0
3 years ago
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