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3 years ago

What is the value of y in the equation 5x + 2y = 20, when x = 0.3?

Mathematics

2 answers:

Brilliant_brown [7]3 years ago

6 0

Answer: 9.25

Step-by-step explanation:

Given equation : $5x + 2y = 20$

To find the value of y at x= 0.3, we need to first substitute the value of x= 0.3 in the given equation.

Now, Substitute x= 0.3 in given equation, we get

$5(0.3) + 2y = 20\\\\\Rightarrow\ 1.5+2y=20$

Subtract 1.5 from both sides .

$2y=18.5$

Divide both sides by 2 .

$y=9.25$

Hence, the value of y= 9.25

Dimas [21]3 years ago

5 0

Y=9.25 (short answer but hope this helped u)

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Step-by-step explanation:

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3 years ago

A regular tube of toothpaste costs $2.50 for 3.2 ounces. A travel size tube costs $1.00 for 1.2 ounces. Compare the prices and w

Len [333]

Answer:

The travel size costs 6 % as much as the regular size. Thus the regular size would be more economical and thus a better buy

Step-by-step explanation:

step 1

Find out the unit rate of a regular tube of toothpaste

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To find out the unit rate, divide the total cost by the total weight

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step 2

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step 3

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we have that

The unit rate $\$0.83\ per\ ounce$ represent the 100%

so by proportion

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$\frac{0.83}{100\%}=\frac{0.05}{x}\\\\x=100(0.05)/0.83\\\\x=6\%$

therefore

The travel size costs 6 % as much as the regular size. Thus the regular size would be more economical and thus a better buy

6 0

3 years ago

Please help me for this question

rosijanka [135]

The volume of the given trapezoidal prism is 312 cubic units.

Step-by-step explanation:

Step 1:

To find the volume of a trapezoidal prism, we multiply the area of the trapezoidal surface with the height of the prism.

The area of a trapezoidal surface, $A = \frac{a+b}{2} (h).$

a and b are the lengths of the upper and lower bases and h is the height of the trapezoid.

For the given trapezoid, a is 5 units long and b is 8 units long while height, h is 4 units.

The area of the trapezoidal surface, $A = \frac{5+8}{2} (4) = 6.5(4) = 26.$

So the area of the trapezoidal surface is 26 square units.

Step 2:

To determine the volume of the prism, we multiply the area of the trapezoidal surface with the height of the prism.

The area is 26 square units and the height of the prism is 12 units.

The volume of the prism, $V= 26(12) = 312.$

The volume of the given trapezoidal prism is 312 cubic units.

7 0

3 years ago

Consider the trapezoid below.

Nuetrik [128]

Answer:

57cm²

Step-by-step explanation:

area for trapezoid=

b¹+b²=x

x÷2=v

v×h=z

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14+5=19

19÷2=9.5

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3 0

2 years ago

Parallelogram Property: opposite sides are congruent Solve for x.

boyakko [2]

Answer:

Value of x = 19

Step-by-step explanation:

We know that in a parallelogram opposite sides are congruent.

So, in the given parallelogram side LM ≅ side NO

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Solving the equation to find value of x

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So, value of x = 19

4 0

3 years ago