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m_a_m_a [10]
3 years ago
6

Here are some letters and what they represent. All costs are in dollars. m represents the cost of a main dish. n represents the

number of side dishes. s represents the cost of a side dish. t represents the total cost of a meal. Discuss with a partner: What does each equation mean in this situation? a. M = 7.50
Mathematics
1 answer:
k0ka [10]3 years ago
4 0

The given question is incomplete

Here are some letters and what they represent. All costs are in dollars.

m represents the cost of a main dish.

n represents the number of side dishes.

s represents the cost of a side dish.

t represents the total cost of a meal.

Discuss with a partner: What does each equation mean in this situation? a. a.  m = 7.50

b. m = s + 4.50

c . ns = 6

d. m + ns = t

2. Write a new equation that could be true in this situation.

Answer:

t = 3m -n(s+1)

Step-by-step explanation:

Using the information we can describe the value of each letters

using a and b

  • we have m = 7.50
  • and  m = s + 4.50

        7.50 = s + 4.50

         s = 3

substitute s in c, we get

  • ns =  6
  • n = 6/3 = 2

using equation d we have

  • m + ns = t
  • 7.50 + 6 = t
  • t = 13.50

so we an equation using the above data

t +ns = 3m - n

t = 3m -n(s+1)

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What is the first step to take when solving this linear system of equations by the addition-subtraction method? 2x + 4y = 3 x +
Free_Kalibri [48]

The right answer is Option D.

Step-by-step explanation:

Given equations are;

2x+4y=3    Eqn 1

x+3y=13    Eqn 2

When we use subtraction-addition method, we make one of the variables same with opposite signs so that only one variable remains after addition or subtraction.

In the given problem, we will multiply Eqn 2 with "-2" so that the x variables become equal and then we can add both the equations and solve for y.

Therefore,

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The right answer is Option D.

Keywords: linear equations, subtraction

Learn more about linear equations at:

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#LearnwithBrainly

5 0
3 years ago
PLEASE ANSWER NUMBER 17
zzz [600]
A=1 and 2
B=2 and 4
C=1,2,7 and 14
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7 0
3 years ago
Round 18.57631 to three decimal places.
iVinArrow [24]

❄ Hi there,

let us revise the rounding rules and then, get down to rounding the number.

\sf{Rounding \ Rules:}

  • If the number you need to round is followed by a number from 0 to 4, you round down.
  • If the number you need to round is followed by a number that's 5 or more, you round up.

Now we can start the rounding process.

Reading the problem & the directions, we notice that we need to round to 3 decimal places (3 numbers after the decimal point).

Looking at the fourth number, we notice that it's less than 5.

∴ we need to round down ↡

↬\sf{18.57631 \ rounded \ to \ 3 \ DP \ = \bf{18.576}}

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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2 years ago
Please help me understand
xeze [42]

Step-by-step explanation:

A=2(wl+hl+hw)=2x(14x7+7x7+7x14)=490

Option B is the correct answer

5 0
3 years ago
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