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2 years ago

Can someone please help mee (will give brainliest 20 points!!!)

Mathematics

1 answer:

Mice21 [21]2 years ago

7 0

[a] x = 175 - 7.5p

For a, we are isolating the x variable to one side of the equation.

0.4x + 3p = 70

0.4x = - 3p + 70

x = - 7.5p + 175

[b] x = 115

For b, we are solving for x when p = 8.

x = - 7.5p + 175

x = - 7.5(8) + 175

x = 115

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Write the following expression in words x+7

Lady_Fox [76]

Answer:

The sum of 7 and x.

Step-by-step explanation:

PLS GIVE BRAINLIEST

6 0

3 years ago

To snails are 189 cm apart. They crawl towards each other at rates that differ by 1 cm a minute. After 27 minutes they meet. How

Stella [2.4K]

Speed of snail 1 = 3.795 cm/minute

Speed of snail 2 = 4.795 cm/minute

Solution:

Given that,

Total distance = 189 cm

They crawl towards each other at rates that differ by 1 cm a minute

Let the speed of snail 1 be "x"

Let the speed of snail 2 be "x + 1"

Total time = 22 minutes

Since the snails are moving towards each other,

Speed = x + x + 1 = 2x + 1

How fast is each snail crawling?

$Distance = speed \times time\\\\189 = 2x + 1 \times 22\\\\189 = 44x + 22\\\\44x = 189 - 22\\\\44x = 167\\\\x = 3.795$

Thus,

Speed of snail 1 = 3.795 cm/minute

Speed of snail 2 = 3.795 + 1 = 4.795 cm/minute

7 0

3 years ago

Find the lengths of all 3 sides of each triangle.

Morgarella [4.7K]

Answer:

De=20

EF= positive 3

DF= positive 14

Step-by-step explanation:

Im currently working on these types of equations and I hope this helps! :)

7 0

3 years ago

PLEASE HELP ILL GIVE BRANLIEST!!! ( and 50 points! )

Rama09 [41]

Answer:

As we know:

A nickle is worth 5 cents.

A dime is worth 10 cents.

A quarter is worth 25 cents.

Here is what Robert had:

Number of nickles (a)

Number of dimes (b)

Number of quarters (c)

Here is assumption:

5a + 10b + 25c = 850

a = 3b

c = b + 10

=> 5(3b) + 10b + 25(b + 10) = 850

=> 50b + 250 = 850

=> 50b = 600

=> b = 600/50 = 12

=> a = 3b = 3 x 12 = 36

=> c = b + 10 = 12 + 10 = 22

=> Number of nickles: 36

=> Number of dimes: 12

=> Number of quarters: 22

Hope this helps!

8 0

3 years ago

The population of a town is 81,712 and declines continuously at a rate of 4.1% each year. What is the approximate population of

Ganezh [65]

Data:

P (Final population) = ?
Po (Initial population) = 81712
r (rate) = 4,1% = 0,041
t (time in years) = 17

$P = Po - (Po*r*t)$
$P = 81712 -(81712*0,014*17)$
$P = 81712 - 56953.264$
$P =24758.736$
$\boxed{P \approx 24759}$

Answer:
B) 24759

4 0

4 years ago