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2 years ago

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Patrick made $43.00 mowing lawns around his neighborhood.He decided to spend it at the mall.At the music store he bought 4 cd's

for $8.99 each he also bought a shirt for $6.00 at old navy how much did he spend at the music store

1 answer:

Anna [14]2 years ago

7 0

Answer:

35.96

Step-by-step explanation:

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Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!

I am Lyosha [343]

Answer:

13 l of 15%, 13 l of 25%, 26 l of 70%

Step-by-step explanation:

solutions:

15%, 25% and 70%

final solution:

52 l of 45%

This includes 0.45*52l= 23.4 l acid

Let's assume:

amount of 15% solution= x
amount of 25% solution= y
amount of 70% solution= z
and we have z=2y

so there are 2 equation:

x+y+z=52

0.15x+0.25y+0.7z=23.4

or

x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y

0.15x+0.25y+1.4y=23.4

0.15x+1.65y=23.4
0.15*(52-3y)+1.65y=23.4
7.8-0.45y+1.65y=23.4
1.2y=23.4-7.8
1.2y= 15.6

y=15.6/1.2
y= 13 l

--------

x= 52- 3*13= 13 l
z= 2y= 2*13= 26 l

6 0

2 years ago

What is the equation of a line with a slope of 7 and a point (1, 8) on the line?

Helen [10]

Answer:

$y=7x+1$

Step-by-step explanation:

we know that

The equation of the line into slope intercept form is equal to

$y=mx+b$

where

m is the slope

b is the y-intercept

In this problem we have

$m=7$

$point(1,8)$

substitute and solve for b

$8=7(1)+b$

$8=7+b$

$b=8-7=1$

The equation of the line is equal to

$y=7x+1$

7 0

2 years ago

What number should be added to both sides of the equation to complete the square?<br> х2 + 3x = 6

Daniel [21]

3/2^2 or 0.75 because you have to take the middle value (3), divide it in half, then square it. That would be 0.75.

8 0

2 years ago

What is 80 times 5,000 equal??

AURORKA [14]

Multiply the two numbers

5000 x 80 = 400,000

400,000 is your answer

hope this helps

8 0

2 years ago

Read 2 more answers

At a gas station the price of gas is $2.40 a gallon. Draw a graph to represent the relationship between the cost of gas and the

aivan3 [116]

Answer:

Part A) The graph in the attached figure

Part B) $y=2.40x$

Step-by-step explanation:

Let

y------> the price of gas

x-----> the volume of gas purchase

we know that

The relationship between the cost of gas and the volume purchase represent a direct variation and remember that a relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

In this problem the constant of proportionality k is equal to

$m=k=2.40\frac{\$}{gallon}$

and the y-intercept b is equal to zero because the line passes through the origin

$b=0$

therefore

the linear equation is

$y=2.40x+0$

$y=2.40x$

using a graphing tool

see the attached figure

6 0

3 years ago