2 years ago

Helppppp with alll the problems asap!! Show your work

Mathematics

1 answer:

Nikitich [7]2 years ago

6 0

17) $x+2x+1+3x=\boxed{6x+1}$

18) $17-a+5a-1+4ab=\boxed{4ab+4a+16}$

19) $2(3y-5+y+2)=\boxed{8y-6}$

20) $k^2 +k+k^2 -9k+23+k^2 +k+2k^2 -17=\boxed{5k^2 -7k+6}$

You might be interested in

Find all complex solutions of 5x^2+5x+3=0.

oksian1 [2.3K]

Answer:

see explanation

Step-by-step explanation:

5x² + 5x + 3 = 0 ← in standard form

with a = 5 , b = 5 , c = 3

Solve using the quadratic formula

x = $\frac{-b+/-\sqrt{b^2-4ac} }{2a}$

= $\frac{-5+/-\sqrt{5^2-(4(5)(3)} }{2(5)}$

= $\frac{-5+/-\sqrt{25-60} }{10}$

= $\frac{-5+/-\sqrt{-35} }{10}$

= $\frac{-5+/-\sqrt{-1(35)} }{10}$

= $\frac{-5+/-i\sqrt{35} }{10}$

Then

x = $\frac{-5}{10}$ ± $\frac{1}{10}$ i $\sqrt{35}$ , that is

x = - $\frac{1}{2}$ - $\sqrt{x} \frac{1}{10}$ i $\sqrt{35}$ , - $\frac{1}{2}$ + $\frac{1}{10}$ i $\sqrt{35}$

5 0

3 years ago

What is y=-3/4+2 in standard form

Elenna [48]

Right answer is
Y=5/4

5 0

3 years ago

In a theatre seats are arranged in rows. A teacher took her team of 50 students to the theatre for a field trip.there are 6 rows

lord [1]

48*465=8462*585655*446=745

7 0

3 years ago

When Mindy went to china, she exchanged $1 for 6.589 yuan. What digit is in the hundredths place of 6589?

mafiozo [28]

eight would be the answer

6 0

3 years ago

the height of the rectangular box is 4 times its width, and its length is 2 in more than its width. the volume of the box is 60i

alexandr402 [8]

Step-by-step explanation:

height= 4b

length = 2 + b

volume = 60in³

or, l ×b × h = 60in³

or, (2+b) × b × 4b = 60in³

or, 4b²(2+b) = 60in³

or, 8b² + 4b³ = 60

or, 2b² + b³ = 15

or, b³ + 2b² -15= 0

b= 1.95

l= 2+1.95=3.95

h= 4×1.95 = 7.8

4 0

2 years ago