What does 3x(5)+(-5) equal

How do you solve the right triangle

yaroslaw [1]

Area:
A = base times height/2

Perimeter:
base time length times width

4 0

3 years ago

What is the name for facts in subtraction problems

12345 [234]

The name for facts in subtraction problems: Fact Family is a group of math facts that uses the same numbers, for addition, and subtraction.

Answer: =====> I believe is, Subtraction Fact Strategies, or Fact Families.

1. ). Strategy: ===> Think Addition:

1.). Subtraction Description ====> Using the known addition fact to solve the subtraction problem. Ex. 13-5, think what goes with 5 to make 13?

2.). Strategy: ===> Fact Families

2.). Subtraction Description ====> Think of the fact family to recall the missing number.

3.). Strategy ===> Build Up Through

3.). Subtraction Description ===> Ten Used when either the subtrahend or minuend is 8 or 9. Ex: 14-9: start with 9 and work up through 10: 9 and 1 is 10 and 4 more makes 5.

4.). Strategy ==> Back Down Through Ten

4.). Subtraction Description: ==> Working backward with 10 as a “bridge”. Ex. 15-6, Take 5 away from 15 to get to ten. Then take one more away, leaving 9.

Hope that helps!!! : )

6 0

3 years ago

Brainliest to correct!! Please help :)

Zielflug [23.3K]

Answers: 2700 and 5300 in that order

Katie invested $2700 at a rate of 3% and $5300 at a rate of 4%

===============================================================

Explanation:

x = amount invested at a rate of 3%
y = amount invested at a rate of 4%

Those two amounts must add to 8000 because this is how much she invests total. So x+y = 8000 is the first equation to set up.

The formula we'll be using is the simple interest formula, which is,

i = p*r*t

where p is the amount deposited or principal, r is the interest rate, and t is the number of years. Luckily, we don't have to worry about the time value t because t = 1 so it effectively goes away. We just need to worry about p and r.

The variable p will be tied directly to the values of x and y, as these are deposit amounts. The r values are decimal forms of the percentages (eg: 3% converts to 0.03)

In short, Katie will earn

0.03x dollars from the first account (3% account)
0.04y dollars from the second account (4% account)

In total, she earns 0.03x+0.04y dollars combined. This is set equal to 293 as this is the stated interest she earns over the entire year.

So another equation to set up is 0.03x+0.04y = 293

This only works for simple interest. Compound interest may likely be a different story.

----------------------------------------------------

To summarize so far, we found these two equations:

x+y = 8000
0.03x+0.04y = 293

We have a number of options on how to solve this system. I'll use substitution.

Solve the first equation for y

x+y = 8000

y = 8000-x

Then we'll plug this into the other equation to solve for x like so,

0.03x+0.04y = 293

0.03x+0.04( y ) = 293

0.03x+0.04( 8000-x ) = 293

0.03x+0.04(8000)+0.04(-x) = 293

0.03x+320-0.04x = 293

-0.01x+320 = 293

-0.01x = 293-320

-0.01x = -27

x = -27/(-0.01)

x = 2700

This tells us that Katie invested $2700 at 3%

Use this x value to find y

y = 8000-x

y = 8000-2700

y = 5300

She also invested $5300 at 4%

----------------------------

As a quick check,

x+y = 2700+5300 = 8000

so that works out

Also,

0.03*x = 0.03*2700 = 81
0.04*y = 0.04*5300 = 212
0.03x+0.04y = 81+212 = 293

which also works out. The answers are fully confirmed.

7 0

3 years ago

Complete the number sentence:

mr Goodwill [35]

D. divide 1000
hope this helped

6 0

2 years ago

Solve for the indicated variable in each literal equation a/b = c for b

riadik2000 [5.3K]

If you would like to solve the equation a/b = c for b, you can do this using the following steps:

a/b = c /*b
a = c * b /c
b = a/c

The correct result would be b = a/c.

6 0

3 years ago

What does 3x(5)+￼(-5) equal

What does 3x(5)+(-5) equal