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3 years ago

13

Tickets to a school dance cost $5. Ninety tickets have already been sold. How many more tickets x must be sold to earn at least

$700? Write your answer as an inequality.

1 answer:

alex41 [277]3 years ago

4 0

Step-by-step explanation:

5x90=450

700-450=250

250/5=50

50 more tickets.

i don't know if that's in an inequality form or not. but that's how many tickets

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Solve for x: x - 10 = -12

MakcuM [25]

Answer:

The answer is -2

Step-by-step explanation:

First you do +10 on both sides leaving you with x = -2

And that is your final answer (x=-2)

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2 years ago

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Factor the expression. x^2 – x – 42

IgorC [24]

X^2 - x - 42 = x^2 - 6x + 7x - 42 = x( x - 6) + 7(x - 6) = (x-6)(x+7);
The correct answer is a.

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3 years ago

Use the surface integral in Stokes' Theorem to calculate the circulation of the field Bold Upper F equals x squared Bold i plus

Tom [10]

Stokes' theorem says the integral of the curl of $\vec F$ over a surface $S$ with boundary $C$ is equal to the integral of $\vec F$ along the boundary. In other words, the flux of the curl of the vector field is equal to the circulation of the field, such that

$\displaystyle\iint_S\nabla\times\vec F\cdot\mathrm d\vec S=\int_C\vec F\cdot\mathrm d\vec r$

We have

$\vec F(x,y,z)=x^2\,\vec\imath+4x\,\vec\jmath+z^2\,\vec k$

$\implies\nabla\times\vec F(x,y,z)=4\,\vec k$

Parameterize the ellipse $S$ by

$\vec s(u,v)=\dfrac{u\cos v}{\sqrt5}\,\vec\imath+\dfrac{u\sqrt5\sin v}4\,\vec\jmath$

with $0\le u\le1$ and $0\le v\le2\pi$ .

Take the normal vector to $S$ to be

$\dfrac{\partial\vec s}{\partial\vec u}\times\dfrac{\partial\vec s}{\partial\vec v}=\dfrac u4\,\vec k$

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4 0

3 years ago

if it takes 28 drops of green food coloring to turn a gallon of milk green. How many drops would it take to turn an 8 ounces cup

Ber [7]

Answer:

7/4 or 1.75 drops

Step-by-step explanation:

In one gallon there are 128 ounces, if it takes 28 drops of coloring to turn 128 ounces of milk green then:

28/128

7/32

it takes 7/32 drops of food coloring to turn one ounce of milk green.

for 8 ounces, you multiply it by 8:

8*7/32

7/4≈1.75

∴ It would take 1.75 or 7/4 drops of coloring to turn 8 ounces of milk green.

8 0

3 years ago

Does anyone know the answer, answer ASAP please!!

Natalka [10]

Answer:

A = 39 m²

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

<u>Step 1: Identify Variables</u>

Shorter Diagonal d2 = 3m + 3m = 6m

Longer Diagonal d1 = 9m + 4m = 13m

<u>Step 2: Find Area</u>

Substitute into formula: A = 1/2(13m)(6m)
Multiplication: A = 1/2(78m²)
Multiplication: A = 39 m²

6 0

2 years ago