All categories

3 years ago

Kate has 79 more envelopes to stamp before

Mathematics

1 answer:

Novosadov [1.4K]3 years ago

3 0

Kate has stamped 155 invitations so far.

Step-by-step explanation:

Given,

Total number of invitations = 234

Envelopes left to stamp = 79

Let,

x be the number of envelopes stamped.

According to given statement;

Stamped envelopes + Envelopes left to stamp = Total invitations

$x+79=234$

Subtracting 79 from both sides

$x+79-79=234-79\\x=155$

Kate has stamped 155 invitations so far.

Keywords: linear expression, subtraction

Learn more about subtraction at:

#LearnwithBrainly

You might be interested in

14. Students in a statistics class would like to investigate if more than two-thirds of the Earth is water.

Andre45 [30]

Answer:

Step-by-step explanation:

No, because the p-value of 0.08 is greater than the significance level of 0.05.

3 0

3 years ago

Identify the interval(s) on which the function y = 2x^2 - 8x - 10 is positive.

Serga [27]

Given:

$y=2x^2-8x-10$

To find:

The interval(s) on which the given function is positive.

Solution:

We have,

$y=2x^2-8x-10$

$y=2(x^2-4x-5)$

$y=2(x^2-5x+x-5)$

$y=2(x(x-5)+1(x-5))$

$y=2(x+1)(x-5)$

For zeroes, $y=0$

$2(x+1)(x-5)=0$

$x=-1,x=5$

-1 and 5 divide the number line in three parts $(-\infty , -1),(-1,5),(5,\infty )$ .

Interval Selected Value $y=2(x+1)(x-5)$ Sign

$(-\infty,-1)$ -2 $y=2(-2+1)(-2-5)=14$ +

$(-1,5)$ 0 $y=2(0+1)(0-5)=-10$ -

$(5,\infty)$ 6 $y=2(6+1)(6-5)=14$ +

So, the function is positive for interval $(-\infty,-1)$ and $(5,\infty)$ .

We can say that the function is positive for interval x < -1 and x > 5.

Therefore, the correct option is B.

8 0

3 years ago

Find f(-3).<br> f(x) = 4x + 7

solong [7]

Answer:

f(x) = 4x + 7

f(x) = 4(-3) + 7

f(x) = -12 + 7

f(x) = 5

3 0

4 years ago

Henry was thinking of a number. Henry doubles it and gets an answer of 4. What was the original number?

ozzi

Let x be the number Henry is thinking of.

The number is doubled and got an answer of 4.

That means:

2 · x = 4

2x = 4

This is the equation when Henry doubled the number and got 4 as an answer.

Solve it by dividing both sides by 2.

2x ÷ 2 = 4 ÷ 2

x = 2

The original number Henry was thinking was 2.

Cheers!

6 0

3 years ago

A sales representative earns a 2.5% commission on sales find the commission earned when the total sales are $80,700

defon

0.03 is the correct answer

5 0

3 years ago