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2 years ago

Verify 3/4 + (7/2 + -3/8) = 3/4 + 7/2 + (-3/8)

Mathematics

1 answer:

Iteru [2.4K]2 years ago

3 0

Answer:

when opening the bracket remember that the value outside the bracket will be used to multiply the value inside the bracket

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You and a group of 7 friends go out for pizza. One large pizza and 3 medium drinks cost $21.96. One large pizza and 6 medium dri

Doss [256]

Answer:

Step-by-step explanation:

x = cost of drink

y = total cost

First information: "one large pizza and 3 medium drinks cost $21.96":

3a + b = 21.96

Second information: "one large pizza and 6 medium drinks cost $30.93":

6a + b = 30.93

{3a + b = 21.96

{6a + b = 30.93

{- 3a - b = - 21.96

{6a + b = 30.93

3a = 8.97

a = 2.99

3a + b = 21.96

3•2.99 + b = 21.96

8.97 + b = 21.96

b = 21.96 - 8.97

b = 12.99

Each drink costs $2.99 and each pizza costs $12.99. The linear function rule is:

y = 2.99x + 12.99

I hope I've helped you.

8 0

3 years ago

Mei bought a box of markers for b dollars, a shoulder bag that cost twice as much as the box of markers and a pen that cost $6 l

Masteriza [31]

Box of markers = $ B

Shoulder bag = Twice as much as the box of markers = $ 2B

Pen = Six less than the shoulder bag = $ (2B - 6)

Hence, the cost of pen is $ (2B - 6).

3 0

2 years ago

Write an inequality for the graph

d1i1m1o1n [39]

the inequality for the graph is x<3

8 0

3 years ago

Find the area of each figure below

Ugo [173]

Answer:

25. $27a^{3}b^{2}$

26. $3\pi x^{3}y$

Step-by-step explanation:

For 25:

$A = \frac{a+b}{2} h$ (area of a trapezoid)

$A=\frac{11a^{2}b+7a^{2}b}{2} *3ab$ (substitute terms)

$= \frac{18a^{2}b}{2}*3ab$ (collect like terms)

$= 9a^{2}b*3ab$ (reduce the fraction by crossing out 2)

$= 27a^{3}b^{2}$ (calculate)

For 26:

$A=\pi r^{2}$ (equation of area of a circle)

$A=\pi (3x^{3} y)^{2}$ (enter the radius)

$= 3\pi x^{3} y$ (communtative property to reorder the terms)

7 0

2 years ago

Simplify the following expression: (−4)(−2)(−3) a) −24 B) −11 C) 11 d)24

professor190 [17]

D
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7 0

3 years ago

Verify 3/4 + (7/2 + -3/8) = 3/4 + 7/2 + (-3/8)​

Verify 3/4 + (7/2 + -3/8) = 3/4 + 7/2 + (-3/8)