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ollegr [7]
2 years ago
10

4x²+ 5x- 6 = 0 O A. -2 O B. -1.5 O C. -1.25 O D. 1.5​

Mathematics
1 answer:
liubo4ka [24]2 years ago
4 0

Answer:

B

Step-by-step explanation:

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Two years ago, Rita was three times older than Cheryl. In 3 years, Rita will be twice older than Cheryl. How old are the girls n
Brrunno [24]

Answer:

Cheryl's age = x = 7 years

Rita's age = y = 17 years

Step-by-step explanation:

Let

Cheryl's age = x

Rita's age = y

Two years ago, Rita was three times older than Cheryl

(y - 2) = 3(x - 2)

y - 2 = 3x - 6

y = 3x - 6 + 2

= 3x - 4

y = 3x - 4

In 3 years, Rita will be twice older than Cheryl

(y + 3) = 2(x + 3)

y + 3 = 2x + 6

y = 2x + 6 - 3

= 2x + 3

y = 2x + 3

Equate both equations

3x - 4 = 2x + 3

Collect like terms

3x - 2x = 3 + 4

x = 7 years

Substitute x = 7 into

y = 2x + 3

= 2(7) + 3

= 14 + 3

= 17

y = 17 years

Cheryl's age = x = 7 years

Rita's age = y = 17 years

5 0
3 years ago
What's is an equation of the line that passes through the point(-3,-1) and is perpendicular to the line x-2y=6
katrin2010 [14]

Answer:

y+1=-2(x+3)

Step-by-step explanation:

Slope is negative reciprocal when two lines are perpendicular

m1=1/2 therefore m2=-2

The equation of the line in point-slope form is given as

y-y_1=m_2(x-x_1)

Here m=-2 and (x1, y1)=(-3, -1)

Therefore,

y+1=-2(x+3)

6 0
3 years ago
Please answer this correctly
jolli1 [7]

Answer:

6 times

Step-by-step explanation:

1/9 chance you get the orange marble. If you pick 54 times, you can expect to get the orange marble 6 times.

5 0
3 years ago
13. Classify Each Angle Pair then find the value of X
Virty [35]

Answer:

5

Step-by-step explanation:

As corresponding lines are equal

16x+1 = 79

16x = 80

x = 5

3 0
2 years ago
Please help me i will give biranlyest to who gets this done for me. thank you just do 2,3,4
morpeh [17]

Answer:

2: 6+4+6= 16

3: 6+6+9+9+18=48

4: 6+2+12+3+8= 36

I really hope this helped I’m not very Experienced in this.

6 0
2 years ago
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