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3 years ago

5a +4b+c-3a-c+4b simplified

Mathematics

1 answer:

MAVERICK [17]3 years ago

4 0

Answer:

2a + 8b

Step-by-step explanation:

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The cost of 7 apples is $2.10. What is the constant of proportionality that relates to the number of apples ,x, to the cost in d

Tomtit [17]

Answer:

y is the number of apples.

Step-by-step explanation: Because if x is the cost for one apple then y is for the number of apples.

4 0

2 years ago

Find the constant of proportionality k. Then write an equation for the relationship between x and y

ExtremeBDS [4]

Question:

Find the constant of proportionality k. Then write an equation for the relationship between x and y

$\begin{array}{ccccc}x & {2} & {4} & {6} & {8} \ \\ y & {10} & {20} & {30} & {40} \ \ \end{array}$

Answer:

(a) $k = 5$

(b) $y = 5x$

Step-by-step explanation:

Given

$\begin{array}{ccccc}x & {2} & {4} & {6} & {8} \ \\ y & {10} & {20} & {30} & {40} \ \ \end{array}$

Solving (a): The constant of proportionality:

Pick any two corresponding x and y values

$(x_1,y_1) = (2,10)$

$(x_2,y_2) = (6,30)$

The constant of proportionality k is:

$k = \frac{y_2 - y_1}{x_2 - x_1}$

$k = \frac{30-10}{6-2}$

$k = \frac{20}{4}$

$k = 5$

Solving (b): The equation

In (a), we have:

$(x_1,y_1) = (2,10)$

k can also be expressed as:

$k = \frac{y- y_1}{x- x_1}$

Substitute values for x1, y1 and k

$5 = \frac{y- 10}{x- 2}$

Cross multiply:

$y - 10 = 5(x - 2)$

Open bracket

$y - 10 = 5x - 10$

Add 10 to both sides

$y - 10 +10= 5x - 10+10$

$y = 5x$

6 0

3 years ago

Please help me and answer both? tysm and enjoy your day! hope this helps!

IceJOKER [234]

The answer is C and b

8 0

2 years ago

Nora's leaf collection consisted of 150 leaves by August. By december , her collection had grown to 177 leaves. How much did her

Elza [17]

Answer=18%

177/150=1.18

1.18=118%

118%-100%=18%

___________________________
another way to solve the equation...

150 177
_____=_____
100% x

Cross Multiply
150x=17700
divide both sides by 150
x=118%

118%-100%=18%

4 0

2 years ago

The question is in the picture

trasher [3.6K]

Answer:

should also = 35* if I'm not mistaken

Step-by-step explanation:

if this is wrong I'm very sorry. if no one else helps u with in the next 10 mins I suggest using socratic, it helps me

8 0

3 years ago