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4 years ago

Evaluate the expression when x = 7 and y = 2 x – y – 3 a. 2 b. 5 c. 6 d. 8

Mathematics

1 answer:

Kaylis [27]4 years ago

4 0

X - y - 3 (replace x with 7 and replace y with 2)
7 - 2 - 3
5 - 3
2

The answer is 2.

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Liz earns a salary of $2,200 per month, plus a commission of 7% of her sales. She wants to earn at least $2,400 this month. Ente

Tema [17]

Liz needs to sale items of worth at least $2857.14 in order to meet her goal.

Step-by-step explanation:

Given,

Salary of Liz = $2200 per month

Commission rate = 7% = 0.07

Amount she wants to earn = $2400 or more

Let,

p be the worth of items she sale.

Amount of commission = 0.07p

Now,

Amount of commission + Monthly salary ≥ Amount she wants to earn

0.07p+2200≥2400

Solving the inequality;

$0.07p\geq 2400-2200\\0.07p\geq 200$

Dividing both sides by 0.07

$\frac{0.07p}{0.07}\geq \frac{200}{0.07}\\p\geq 2857.14$

Liz needs to sale items of worth at least $2857.14 in order to meet her goal.

Keywords: inequality, division

Learn more about inequality at:

#LearnwithBrainly

7 0

4 years ago

Verify: sec^2x+tan^2x=2sec^2x-1

Jlenok [28]

Answer:

see explanation

Step-by-step explanation:

Using the identity

tan²x = sec²x - 1

Consider left side

sec²x + tan²x

= sec²x + sec²x - 1

= 2sec²x - 1

= right side , thus verified

8 0

3 years ago

Ill mark brainlist plss help

tatiyna

Answer:

D: Non-Vascular

Step-by-step explanation:

Non Vascular plants are plants without Xylem and Phloem, and instead use other simpler tissues to move water around.

7 0

3 years ago

At which point would the graphs of the equations below intersect?

Serhud [2]

Answer:

can't explain without you arranging your mathematical expression

3 0

2 years ago

What is the value of x in the equation-2/3x+9=4/3x-3

Ronch [10]

Answer:

Step-by-step explanation:

$-\frac{2}{3} x+9=\frac{4}{3} x-3\\\\$

First, multiply both sides by 3.

$-2x+27=4x-9\\$

Next, combine like terms.

$-2x+27=4x-9\\-2x+36=4x\\36=6x$

Solve for x.

$36=6x\\6=x$

3 0

3 years ago