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dolphi86 [110]
3 years ago
12

How many ways to make 80 cent

Mathematics
1 answer:
Levart [38]3 years ago
8 0
I believe it’s 4. If I’m wrong, please correct me. :)
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2k^2 + 9k = -7 using quadratic equation
Pepsi [2]

Answer:(k+1)(2K+7)

Step-by-step explanation:

Using the quadratic formula

X=-b±-√b^2-4ac/2a

ax^2+bx+c=0

2k^2+9k+7=0

In this case a=2,b=9,c=7

-9+-√9^2-4(2)(7)/2(2)

(-9+√25)/4=-9+5/4=-1

(-9-√25)/4=-14/4 =-7/2

X=-1,X=-7/2

So (K+1)(k+7/2)

So (k+1)(2k+7)

6 0
3 years ago
Akira and a business associate agree to invest in a project estimated to cost $1.8 million (1,800,000). They decide to split the
MariettaO [177]
If it's relationship Akira : Business A. = 7:5 

The part of Akira is 7k

and the part of the Business A. is 5k

Then

7k+5k=12k => 12k=1,800,000 => k= 1,800,00/12=150,000$

Akira part is 7k= 7 * 150,000 = 1,050,000$

Good luck!!!!
8 0
4 years ago
Find the measure of each angle (in degrees) of
d1i1m1o1n [39]

Answer:

∠A = 88°

∠B = 92°

∠C = 88°

∠D = 92°

Step-by-step explanation:

∠A + ∠B = 180°

(2x + 4) + (3x - 34) = 180

reduce:

5x - 30 = 180

5x = 210

x = 42

∠A = 2(42) + 4 = 88°

∠B = 3(42) -34 = 92°

∠C = ∠A = 88°

∠D = ∠B = 92°

3 0
3 years ago
2x-y=-10 y=4 what is the solution
ratelena [41]

Answer:

(- 3, 4)

Step-by-step explanation:

given the 2 equations

2x - y = - 10 → (1)

y = 4 → (2)

Substitute y = 4 into (1) and solve for x

2x - 4 = - 10 ( add 4 to both sides )

2x = - 6 ( divide both sides by 2 )

x = - 3

solution is (- 3, 4 )


3 0
3 years ago
Find the general indefinite integral. (use c for the constant of integration.) (1 − t)(9 + t2) dt
Oksi-84 [34.3K]
This is most easily done using the expanded form of the expression.
  ∫(9 -9t +t² -t³)dt = 9t -(9/2)t² +(1/3)t³ -(1/4)t⁴ +c
6 0
3 years ago
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