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Tamiku [17]
3 years ago
13

Please answer question in picture

Mathematics
1 answer:
olchik [2.2K]3 years ago
7 0
If X=-1
Then to find y you will just subsitute it to your equation.
Y=4x+4
Y=4(-1)+4
Y=-4+4
Y=0

So y=0
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one light flashes every 2 minutes and another flashes every 7 minutes. If both lights flash together at 1pm, what is the first t
vovangra [49]
Light A flashes every 2 minutes while light B flashes every 7. The goal is to figure out when both lights flash at the same time and then figure out the other part later. You have to find the common multiples of 7 and 2. Meaning that you have to find out which number can they both be multiplied into. In this case, it is 14 because 7 can be multiplied by 2 to get 14 and 2 can be multiplied by 7. So if every 14 minutes they flash together at the same time, now you need to find out what time AFTER 3 will they both flash. You know that they both flashed at 1:00 so they will flash again at 1:14 and 1:28 and so on, but you need to find out when is the soonest they will flash after 3. 2 hours after the 1:00 flash will be 3:00 so that is 120 minutes. 120 minutes divided by 14 minutes comes to 8.5 but you dont need the decimal. Just simply multiply 14 by 8 and that comes to 112 minutes and if you add that to 1:00 you get 2:52. so they flashed at 2:52 so the next time they flash will be 14 minutes after 2:52. Sorry for the super long answer
6 0
3 years ago
Help ME! I’m literly struggling
miv72 [106K]

Answer:

See explanation below

Step-by-step explanation:

BD - diagonal                                    Added Construction              

m∠CBD = m∠ADB            Alternate Interior Angles Theorem        

BD ≅ DB                                             Reflexive Property                  

m∠A = m∠C                          Opposite ∠'s Congruent Theorem

ΔABD ≅  ΔCDB                                     AAS or SAS                                    

BC ≅  DA                                                 CPCTC              

AC - diagonal                                             Added Construction    

m∠BCA = m∠CAD                   Alternate Interior Angles Theorem

AC ≅ CA                                                  Reflexive Property    

m∠B = m∠D                              Opposite ∠'s Congruent Theorem

ΔABC ≅  ΔCDA                                            AAS or SAS                                                  

AB ≅  CD                                                           CPCTC          

6 0
2 years ago
Plz<br> help<br> now<br> im<br> dew<br> in<br> a<br> hour
forsale [732]

Answer:

D. x<2

Step-by-step explanation:

-1+ 6-1-3x) >- 39 - 2x

Multiply the parentheses by 6

- 1-6 - 18x > - 39 - 2x

Calculate

7- 18x > - 39 - 2x

Move the terms

18x + 2x > -39 +7

Collect like terms Calculate

- 16x>-32

Divide both sides by - 16

x < 2

8 0
3 years ago
4) A window is in the form of a rectangle surmounted by a semicircle. The rectangle is of clear glass, whereas the semicircle is
lisov135 [29]

Answer:

l=0.1401P\\

w =0.2801P

where P = perimeter

Step-by-step explanation:

Given that a window is in the form of a rectangle surmounted by a semicircle.

Perimeter of window =2l+\pid/2+w

P= 2l+3.14 (w/2)+w

Or P = 2l+2.57w\\l = \frac{P-2.57w}{2}

To allow maximum light we must have maximum area

Area = area of rectangle + area of semi circle where rectangle width = diameter of semi circle

A=lw +\pi \frac{w^2}{8}

A=lw +\pi \frac{w^2}{8}\\A=w*\frac{P-2.57w}{2}+0.3925w^2\\2A= Pw-2.57w^2+(0.785w^2)\\2A' = P-5.14w+1.57 w\\2A" =-5.14+1.57

Hence we get maximum area when i derivative is 0

i.e. P-5.14w+1.57 w=0\\3.57w =P\\w = \frac{P}{3.57} =0.2801P

l = \frac{P-2.57w}{2}\\l = 0.1401P

Dimensions can be

l=0.1401P\\w =0.2801P

5 0
3 years ago
WHO WANTS BRANLIEST?!?!?!?!?!?!?!?
denis23 [38]

Answer:

I Do

Step-by-step explanation:

5 0
3 years ago
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