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3 years ago

I need help with this pleaseee!

Mathematics

1 answer:

ololo11 [35]3 years ago

7 0

Probably B

STEP BY STEP

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PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!

ikadub [295]

Answer: 4095

Step-by-step explanation:

He sold 1 car on the first day so the first term (a) is 1. The amount doubles each month so the ratio (r) is 2.

Input those values into the Sum formula:

$S_n=\dfrac{a(1-r^n)}{1-r}\\\\S_{12}=\dfrac{1(1-2^{12})}{1-2}\\\\.\quad=\dfrac{1-4096}{-1}\\\\.\quad=\dfrac{-4095}{-1}\\\\.\quad=4095$

7 0

3 years ago

Through (2, -1), perp. to y = -2x-3

kramer

9514 1404 393

Answer:

y = 1/2x -2

Step-by-step explanation:

The given equation is in slope-intercept form, so you recognize its slope is -2. The perpendicular line will have a slope that is the opposite reciprocal of that, so is -1/-2 = 1/2.

The y-intercept can be found from ...

b = y -mx . . . . . for line of slope m through point (x, y)

b = -1 -(1/2)(2) = -1 -1 = -2

Then the slope-intercept equation of the perpendicular line is ...

y = 1/2x -2

6 0

2 years ago

A to B is 420 mile away, A travels 40 mph and B travels 80 mph. they toward to each other. how many hour will they meet ?

N76 [4]

Answer:

Step-by-step explanation:

I hope these are people in vehicles travelling toward each other.

80 mh * t + 40 mph * t = 420 miles

The two vehicles are going to travel a total of 420 miles. B will cover a lot more ground than A, but together they will make 420 miles

80t + 40t = 420

120t = 420

t = 420/120

t = 3.5

So after driving 3.5 hours, the two cars will meet.

5 0

3 years ago

Ayuda con estos ejercicios

joja [24]

1. x=6
2. y=6
3. x=10
4. y=10

1.c+9= 19
2. 9-y=7
3. 5y=30
4. u-u=0

1. 2(3x2 - 5x3)
2(6-15)
2x(-9)=18

3 0

2 years ago

From place value relationships the 4s in 344 is?

BabaBlast [244]

From place value relationships the 4s in 344 is 86
__4s___ __344__
4 4
S = 86

ANS : S = 86

7 0

3 years ago