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jek_recluse [69]
3 years ago
6

Solve using the guess-and-check strategy.

Mathematics
2 answers:
Nadya [2.5K]3 years ago
7 0
The answer is 12. Matthew would be 12 & Elizabeth would be 7. 12+7=19. So C is your answer. 

Ksivusya [100]3 years ago
4 0
The simplest way to do this would be to first subtract 5 from the total, because Matthew is going to be five years older than her.

19 - 5 = 14

14 will divide evenly by 2, making them each 7, but since Matthew is 5 years older, and 5 back to 7 to get his age.

7 + 5 = 12.

Matthew is 12 and Elizabeth is 7. Check your work.

12 + 7 = 19
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Pleaseee helpppp <3
Serjik [45]

h=-16t^2+36t+4\implies \stackrel{h}{0}=4(-4t^2+9t+1)\implies 0=-4t^2+9t+1 \\\\[-0.35em] ~\dotfill\\\\ ~~~~~~~~~~~~\textit{quadratic formula} \\\\ 0=\stackrel{\stackrel{a}{\downarrow }}{-4}t^2\stackrel{\stackrel{b}{\downarrow }}{+9}t\stackrel{\stackrel{c}{\downarrow }}{+1} \qquad \qquad t= \cfrac{ - b \pm \sqrt { b^2 -4 a c}}{2 a}

t= \cfrac{ - (9) \pm \sqrt { (9)^2 -4(-4)(1)}}{2(-4)} \implies t = \cfrac{ -9 \pm \sqrt { 81 +16}}{ -8 } \\\\\\ t= \cfrac{ -9 \pm \sqrt { 97 }}{ -8 }\implies t=\cfrac{9\mp\sqrt{97}}{8}

5 0
11 months ago
Need help on this ASAP! It’s due right now someone please help
Diano4ka-milaya [45]

Answer:

Part a would be "C" and part b would be "C" I believe

Step-by-step explanation:

(a):it is a constant speed, then decline, then back to constant.

(b):constant then he gets slower.

3 0
3 years ago
Please help I need an answer fast
sp2606 [1]
All you need to do is use the formula to solve. What I do is I plug in the information that I know, and then I just solve. In this case it would be: 

V= (4)
       -    pie(3.14)*4.8(cubed) 
       3 

I hope I was a good help, and if you still need help, come to my page and ask the question on specifically what you need help with. :D
5 0
3 years ago
The sum of a number and 3 times its reciprocal is -4.Find the number
Butoxors [25]

Answer:

x = -1 or x = -3

Step-by-step explanation:

x + 3/x = -4

x² + 3 = -4x

x² + 4x + 3 = 0

(x + 1) (x + 3) = 0

x = -1 or x = -3

check: (-1) + (3/-1) = -1 - 3 = -4

           (-3) + (3/(-3)) = -3 -1 = 14

6 0
3 years ago
Answer correclty
kolezko [41]

Answer:

2. B) The events have a strong positive linear correlation.

1. C) Find the slope using the slope formula:

\frac{y_2 - y_1}{x_2 - x_1}

Step-by-step explanation:

2. The correlation coefficient is 0,02, which is positive, so this would be the obvious choice.

1. You CANNOT write a linear equation without FIRST finding the rate of change [slope]. You will ALWAYS need the rate of change in order to write any linear equation.

I am joyous to assist you anytime.

5 0
2 years ago
Read 2 more answers
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