All categories

3 years ago

Find each product mentally. 7 times 3.8

1 answer:

5 0

To do it mentally means to do it in your head

first do 7 * 3 = 21 in your head

than do 7 * 0.8 = 5.6 ( this might be hard to do in your head but you know 7*8 = 56 so add a decimal since it is 0.8 not 8 )

Add : 21 + 5.6 = 26.6

Final Answer : 26.6

You might be interested in

Find an equation of a line with the x- and y-intercepts below. Use exact fractions when necessary.

Ludmilka [50]

Answer:

The line with the x- and y-intercepts below has the following equation:

$f(x) = \frac{5x}{7} - 5$

Step-by-step explanation:

The equation of the line has the following format:

$f(x) = ax + b$

We are given two points, we are going to substitute them into the above equation, and find the equation of the line given the conditions.

Solution

Starting from the y-intercept makes the solution easier, since the term a is multiplied by 0

y-intercept -5

This means that when $x = 0, y = f(x) = -5$ , so:

$f(x) = ax + b$

$-5 = a(0) + b$

$b = -5$

For now, the line has the following equation:

$f(x) = ax - 5$

x-intercept 7

This means that when $y = f(x) = 0,x = 7$ , so:

$f(x) = ax - 5$

$0 = 7(a) - 5$

$7a = 5$

$a = \frac{5}{7}$

So, the line with the x- and y-intercepts below has the following equation:

$f(x) = \frac{5x}{7} - 5$

5 0

2 years ago

2x^2-12x+6=0 how to solve

Alona [7]

Answer:

x=3+sqrt{6}

Step-by-step explanation:

4 0

2 years ago

What is an equation of a line passing through the given point

Mademuasel [1]

I believe it is y=mx+b..........y equals slope times x plus the y intercept...or y=-8/3x+4.that would mean your slope would be negative. meaning it would go from the left top hand corner and fall through to the bottom right hand corner.

4 0

3 years ago

andy writes an addition fact one addend is 9. the sum is 17.. what is the other addend? write the addition fact.

professor190 [17]

$x-\ other\ added\ number\\\\
x+9=17\ \ \ | subtract\ 9\\\\
x=8\\\\Searched\ number\ is\ equal\ to\ 8.$

7 0

3 years ago

Read 2 more answers

A 26' Long painting is how many yards Long

Alenkinab [10]

In one foot, there are 0.33 yards.
Therefore, you need to multiply 26 by 0.33
20x0.33= 6.6
6x0.33= 1.98 yards.
6.6+1.98= 8.58
Therefore, in a 26' long painting, there are 8.58 yards
Hope this helps :)

3 0

3 years ago

Read 2 more answers