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3 years ago

The sales tax for an item was 12.80 and it cost 320 before tax

Mathematics

1 answer:

Arlecino [84]3 years ago

8 0

Answer:

Step-by-step explanation:

Divide the tax by the pre-tax price =

12.80/320 = .04 or 4%

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A spider ate 25% more bugs this month then last month the spider ate 8 bugs last month

Ierofanga [76]

In this month spider ate 10 bugs.

Step-by-step explanation:

Given,

The spider ate 25% more bugs than last month.

It ate 8 bugs in last month.

To find the number of bugs it ate this month.

Solution

It ate more bugs = 8×25%

=8× $\frac{25}{100}$ = 2

In this month it ate = 8+2 = 10 bugs.

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3 years ago

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The diameter of a circle is given by the two points (5,-2) and (1,-2). What is the length of the diameter? What is the radius of

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Answer:

Diameter: 4

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Equation: ( x-3 ) + ( y + 2) = 4

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3 years ago

Identify the correct logical reason for the next step in solving this equation. 3(2 − 3x) + 4x = x − 7 Question 2 options: Multi

suter [353]

Answer:

Distributive property

Step-by-step explanation:

3(2 − 3x) + 4x = x − 7

Distribute the 3 to each term in the parentheses using the distributive property

6 -9c +4x = x-7

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3 years ago

Solve using the quadratic formula. Show all work. Write each solution in simplest form. No decimals.

BabaBlast [244]

Answer:

Step-by-step explanation:

We want to solve the equation:

$x^2+2x+7=0$

Using the quadratic formula. The quadratic formula is given by:

$\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

In this case, a = 1, b = 2, and c = 7.

Substitute:

$\displaystyle x=\frac{-(2)\pm\sqrt{(2)^2-4(1)(7)}}{2(1)}$

Evaluate:

$\displaystyle x=\frac{-2\pm\sqrt{-24}}{2}$

Simplify the square root:

$\sqrt{-24}=\sqrt{4\cdot 6\cdot -1}=\sqrt{4}\cdot\sqrt{6}\cdot\sqrt{-1}=2i\sqrt{6}$

Hence:

$\displaystyle x=\frac{-2\pm2i\sqrt{6}}{2}$

Simplify:

$\displaystyle x=-1\pm i\sqrt{6}$

Hence, our solutions are:

$\displaystyle x=\left\{-1+i\sqrt{6}, -1-i\sqrt{6}\right\}$

Our answer is C.

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2 years ago

What is the value of the expression 12-15÷3+9 ?

satela [25.4K]

12 - 15 ÷ 3 + 9

Following BODMAS = Bracket Order Division Multiplication Addition Subtraction

Division comes before Addition and Subtraction, so we carry out Division first.

12 - 15 ÷ 3 + 9, 15 ÷ 3 = 5

12 - 5 + 9

7 + 9

16

I hope you find this explanation useful.

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2 years ago

The sales tax for an item was 12.80 and it cost 320 before tax​

The sales tax for an item was 12.80 and it cost 320 before tax