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3 years ago

Im DESPERATE for help. only answer if you are 100 percent sure please!! WILL GIVE BRAINLIEST

Mathematics

2 answers:

mina [271]3 years ago

5 0

Answer:D and B

Step-by-step explanation: Hope this helps! HAVE A NICE DAY!

shutvik [7]3 years ago

3 0

Answer:

the answers are d and b

Step-by-step explanation:

d. 19x - 18 = -19x + 18

38x - 18 = 18

38x = 36

x= 36/38= 18/19

b. 19x + 18= -19x + 18

38x + 18 = 18

38x = 0

x =0

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Please help me! This is for a grade so if you don’t know it please don’t answer this question! I will give brainliest if right!!

Schach [20]

Answer:

40/1 you'd drive 40 miles an hour

4 0

3 years ago

Mia won 77 pieces of gum playing hoops at her schools game night. Later, she gave 3 each of her friends. She only has five remin

Vilka [71]

She has 24 friends.

Explanation

Suppose, the number of friends is $x$

She gave 3 pieces of gum each of her friends. So, the total number of gums given to $x$ numbers of friends will be: $3x$

She had total 77 pieces of gums and after giving to her friends, she has only 5 remaining. So, the equation will be......

$3x+5=77\\ \\ 3x=77-5= 72\\ \\ x= \frac{72}{3}= 24$

So, she has total 24 friends.

4 0

3 years ago

A 200-liter tank initially full of water develops a leak at the bottom. Given that 20% of the water leaks out in the first 5 min

Leya [2.2K]

Answer:

127.53 liters left after 10 minutes

Step-by-step explanation:

Let

$A \to Amount$

$t \to time$

Given

$A(0) = 200$ --- initial

$A(5) = 200 * (1 - 20\%) = 160$ --- the amount left, after 5 minutes

Required

$A(10)$ --- amount left after 5 minutes

To do this, we make use of:

$A(t) = A(0) * e^{kt}$

$A(5) = 160$ implies that:

$160 = 200 * e^{k*5}$

Divide both sides by 200

$0.80 = e^{k*5}$

Take natural logarithm of both sides

$\ln(0.80) = \ln(e^{k*5})$

$\ln(0.80) = \ln(e^{5k})$

$\ln(0.80) = 5k\ln(e)$

So, we have:

$-0.223 = 5k$

Divide by 5

$k = -0.045$

So, the function is:

$A(t) = A(0) * e^{kt}$

$A(t) = 200 * e^{-0.045t}$

The amount after 10 minutes is:

$A(10) = 200 * e^{-0.045*10}$

$A(10) = 200 * e^{-0.45}$

$A(10) = 127.53$

3 0

3 years ago

Find the quotient. 410 42 A) 48 B) 412 C) 4−8 D) 4−12

Julli [10]

Answer: d

Step-by-step explanation:

Final result :

205

——— = 9.76190

Step by step solution :

Step 1 :

205

Simplify ———

Final result :

205

——— = 9.76190

6 0

3 years ago

Read 2 more answers

Please help meeeeeeeeee

Aliun [14]

Answer:

a, b, d

Step-by-step explanation:

its one of those

8 0

2 years ago

Read 2 more answers

Im DESPERATE for help. only answer if you are 100 percent sure please!! **WILL GIVE BRAINLIEST**

Im DESPERATE for help. only answer if you are 100 percent sure please!! WILL GIVE BRAINLIEST