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3 years ago

Evaluate the following expression for y=25 and g=58(y÷g)-4y÷g+9

Mathematics

2 answers:

Monica [59]3 years ago

8 0

Answer:

8(25/5) - 4(25) / 5 + 9

40 - 100 / 5 + 9

40- 20+9

20 + 9

Step-by-step explanation:

remember PEMDAS. First parenthesis, them exponents (there ar eno ecponents or parenthesis here) then mulitiplication or division (whichever is first) then subtraction or addition (whichever is first in the equation)

Lorico [155]3 years ago

7 0

Answer:

Step-by-step explanation:

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Marie, Shelia, and Martha bought snacks for a girl's sleepover. They each bought the items shown in the following table at the l

creativ13 [48]

Using a system of equations, it is found that the unit prices are:

$2.25 for a bag of chips.

$1.50 for a liter of pop.

$1.75 for a chocolate bar.

For the system:

x is the unit price of a bag of chips.

y is the unit price of liter of pop.

z is the unit price for a chocolate bar.

From the table, the equations are:

$2x + 2y + z = 9.25$

$3x + 4y + z = 14.50$

$x + 3y + 3z = 12$

Replacing the <u>first equation on the second and the third:</u>

$z = 9.25 - 2x - 2y$

$3x + 4y + z = 14.50$

$3x + 4y + 9.25 - 2x - 2y = 14.50$

$x + 2y = 5.25$

$x = 5.25 - 2y$

$x + 3y + 3z = 12$

$x + 3y + 3(9.25 - 2x - 2y) = 12$

$-5x - 3y = -15.75$

$5x + 3y = 15.75$

Since $x = 5.25 - 2y$ :

$5(5.25 - 2y) + 3y = 15.75$

$-7y = -10.5$

$y = \frac{10.5}{7}$

$y = 1.5$

Then:

$x = 5.25 - 2y = 5.25 - 2(1.5) = 2.25$

$z = 9.25 - 2x - 2y = 9.25 - 2(2.25) - 2(1.5) = 1.75$

The unit prices are:

$2.25 for a bag of chips.

$1.50 for a liter of pop.

$1.75 for a chocolate bar.

A similar problem, also solved using a system of equations, is given at brainly.com/question/14183076

4 0

3 years ago

|5−4r|=17 find r Answer in as many ways as possible IF you don't answer the question and fool around I will report you

sergejj [24]

Answer:

r1= -3

r2= (11/2)

Step-by-step explanation:

5-4r=17

-4r=17-5

-4r=12

r=13

and

5-4r=-17

-4r=-22

r= 11/2

3 0

3 years ago

How to find the surface area of rectangular prism

S_A_V [24]

A= 2 WL+ 2 LH+ 2 HW.

W= width
L= length
H= height

7 0

3 years ago

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OlgaM077 [116]

Answer:

$47.92

Step-by-step explanation:

20% discount: $599 * 80% = $479.2 before tax

15% tax added: $479.2 + $71.88 = $551.08

Saved money: $599-$551.08= $47.92

6 0

3 years ago

Write a quadratic function f whose zeros are -3 and -4

dlinn [17]

Answer:

Step-by-step explanation:

Zeros α = -3 and β = -4

Quadratic equation: x² - (α + β)x + αβ = 0

x² - (-3-4)x + (-3)*(-4) = 0

x² - (-7)x + 12 =0

x² + 7x + 12 = 0

7 0

3 years ago

Evaluate the following expression for y=25 and g=58(y÷g)-4y÷g+9​

Evaluate the following expression for y=25 and g=58(y÷g)-4y÷g+9