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3 years ago

Can you explain or tell me the answer please and thank you

Mathematics

2 answers:

Morgarella [4.7K]3 years ago

6 0

28 1/2 + 14 3/8 = 42 7/8

STatiana [176]3 years ago

4 0

42 7/8

You add 28+14=42 and the bigger denominator doesn’t change then you add 3+4

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Even if I have use bidmas I'm still confuse with this equation <br> (-7i)(2+i)+(2i)(-7i)

zheka24 [161]

Assuming "i" is an imaginary unit:
$(-7i)(2+i)+(2i)(-7i)=\\
-14i+7+14=\\
21-14i$

5 0

4 years ago

Write an equation of the line that passes through each points (5,6) (3.4)

ioda

Answer:

$y = x + 1$ .

Step-by-step explanation:

Start by finding the slope of this line.

If a slanting line goes through $(x_{0},\, y_{0})$ and $(x_{1},\, y_{1})$ , where $x_{0} \ne x_{1}$ , the slope of this line would be:

$\begin{aligned}m &= \frac{y_{1} - y_{0}}{x_{1} - x_{0}}\end{aligned}$ .

The line in this question goes through $(5,\, 6)$ and $(3,\, 4)$ . Hence, the slope of this line would be:

$\begin{aligned}m &= \frac{y_{1} - y_{0}}{x_{1} - x_{0}} \\ &= \frac{6 - 4}{5 - 3} \\ &= 1\end{aligned}$ .

If a slanting line with a slope of $m$ and goes through the point $(x_{0},\, y_{0})$ , the equation of this line in the point-slope form would be:

$y - y_{0} = m,\, (x - x_{0})$ .

For the line in this question, the slope is $m = 1$ . Take $(5,\, 6)$ as the chosen point on this line. The point-slope form equation of this line would be:

$y - 6 = (x - 5)$ .

Rewrite to obtain the equation of this line in the slope-intercept form:

$y = x + 1$ .

7 0

3 years ago

Find the percent of change from

Mashcka [7]

Answer:

option 4

Step-by-step explanation:

Percent change is calculated as

$\frac{change}{original}$ × 100%

change = 15 - 10 = 5 , then

percent change = $\frac{5}{10}$ × 100% = 5 × 10% = 50%

8 0

2 years ago

Answer asap, please<br> needed by 2:00 pm

myrzilka [38]

Answer:

x < -3

Step-by-step explanation:

The domain in which the function is increasing or getting bigger is from x is negative infinity to is -3

x < -3

7 0

3 years ago

A bathtub contains 12 gallons of water. With these 12 gallons, the bathtub is only 30% full. How many gallons of water can the b

Pachacha [2.7K]

Answer:

40 gallons

Step-by-step explanation:

Let the number of gallons that would completely fill the bathtub be represented by N.

Since 12 gallons of water gives 30% of the number of gallons to fill the bathtub, then;

30% of N = 12

$\frac{30}{100}$ x N = 12

30N = 12 x 100

30N = 1200

divide both sides by 30,

N = $\frac{1200}{30}$

= 40

The number of gallons that would completely fill the bathtub is 40 gallons.

6 0

3 years ago