All categories

2 years ago

I need help with algebra

Mathematics

1 answer:

rosijanka [135]2 years ago

4 0

Answer:

x = -1 and y = 6

Step-by-step explanation:

using x = -b/2a

x = -4 / 2(2)

x = -1

y = 2(-1)² + 4(-1) + 8

y = 2 - 4 + 8

y = 10 - 4

y = 6

You might be interested in

What is the number of terms in this expression?<br> M/4 + 4.6

Sliva [168]

Answer:

Step-by-step explanation:

2terms

4 0

3 years ago

2x-1/6 = 2(x-3)/3 + 1?

IceJOKER [234]

$2x-\frac{1}{6}=\frac{2(x-3)}{3}+1\ \ \ \ |multiply\ both\ sides\ by\ 6\\\\6(2x)-6(\frac{1}{6})=6\left(\frac{2x-6}{3}\right)+6(1)\\\\12x-1=2(2x-6)+6\\\\12x-1=2(2x)+2(-6)+6\\\\12x-1=4x-12+6\\\\12x-1=4x-6\ \ \ \ |add\ 1\ to\ both\ sides\\\\12x=4x-5\ \ \ \ \ |subtract\ 4x\ from\ both\ sides\\\\8x=-5\ \ \ \ |divide\ both\ sides\ by\ 8\\\\\boxed{\boxed{x=-\frac{5}{8}}}$

7 0

3 years ago

Read 2 more answers

How many significant figures are in the number 123.97

Nikolay [14]

Answer:

5 significant figures

Step-by-step explanation:

Any first number than starts with > 0, it is counted as significant figures and with 0 in the middle of number, also will be counted. But if the first number is 0, you have to skip to the next number.

e.g

0.0567 = 3s.f

1.542 = 4s.f

0.0000012 = 2s.f

1200586 = 7s.f

87000000002 = 11s.f

4 0

3 years ago

Read 2 more answers

A length of ribbon measures 3 yd 1 ft 10 in.

Elza [17]

Answer : 11 3/5 inches each or 11.6 inches each

Step-by-step explanation:

There are 3+1 foot=4ft each foot is 12 inches4x12=48+10=58

So you have 58 inches of ribbon. 58/5 =11 3/5 inches each or 11.6 inches each

6 0

3 years ago

Help! Please! You can just give answers if want to make It faster.

sergiy2304 [10]

Answer:

X' = (-3 , -5)

Y' = (-1, -1)

Z' = (4, -8)

General rule: (x,y) = (y, -x)

I am 1 brainly away from the next rank, your help would be appreciated

8 0

3 years ago