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Tresset [83]
3 years ago
11

Adam has 28 model cars and airplanes. He has 16 model cars. The rest of his models are airplanes. Write and solve an equation to

find how many model airplanes Adam has
Mathematics
1 answer:
Phoenix [80]3 years ago
6 0

Answer:

Mathematical equation is Z = X + Y

Adam has 12  models of  airplane

Step-by-step explanation:

Let the total number of models of cars and air planes be represented by "Z"

Let the total number of models of cars be represented by "X"

Let the total number of models of air planes be represented by "Y"

Now the mathematical equation showing the relation between X, Y and Z is as follows -

Z = X + Y

Given ,

Z = 28\\X = 16

Substituting the given values in above equation, we  get -

28 = 16 + Y\\Y = 28 -16\\Y = 12

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Sienna has 5 3/4 pounds of grapes. She eats 1/8 pound and gives 2 1/2 pounds to her brother. How many pounds of grapes does Sien
miskamm [114]

The pounds of grapes left with seinna is 3.125 or \frac{25}{8} pounds

<h3><u>Solution:</u></h3>

Given that Sienna has 5\frac{3}{4} pounds of grapes

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<em><u>To find: pounds of grapes left with seinna</u></em>

We can find the pounds of grapes left with seinna by subtracting the pounds of grapes she ate and pounds of grapes she gave to brother from the total pounds of grapes she had

Pounds of grapes left with seinna = total pounds of grapes - pounds of grapes she ate - pounds of grapes she gave to brother

\text {total pounds of grapes }=5 \frac{3}{4}=\frac{4 \times 5+3}{4}=\frac{23}{4}

\text {pounds of grapes she ate }=\frac{1}{8}

\text {pounds of grapes she gave to brother }=2 \frac{1}{2}=\frac{2 \times 2+1}{2}=\frac{5}{2}

<em><u>Substituting the values we get,</u></em>

\text {Pounds of grapes left with seinna }=\frac{23}{4}-\frac{1}{8}-\frac{5}{2}

\text { Pounds of grapes left with seinna }=5.75-0.125-2.5=3.125

Thus the pounds of grapes left with seinna is 3.125 or \frac{25}{8} pounds

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1. <span>5m+3n=41, 3m−6n=9
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Therefore x = 5 and y = -2.
</span>
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