Complete the equivalent addition expression for each subtraction

Mathematics

1 answer:

PilotLPTM [1.2K]2 years ago

6 0

Answer:

Step-by-step explanation:

We have to write the additive inverse of the second number.

Additive inverse of 4 is (-4)

Additive inverse of (-4) = 4

A. 23 - 3 = 23 + (-3) = 20

B. 7 - (-15) = 7 + (+15) = 22

C. -15 - 4 = -15 + (-4) = - 19

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Find the value of d.

Ket [755]

First find the value or (DEA)
For this you will have to use the Pythagorean theory,
${a}^{2} + {b}^{2} = {c}^{2}$
C is mainly the hypotenuse,
Meaning you either want to find A or B,

Since the hypotenuse has two segments, both values are 10, then just add them together making it 20,

Then 16 will be A or B, in this case it will be A,

To find a you must first move A to the other side by doing the opposite,
${b}^{2} = {c}^{2} - {a}^{2}$
Now plug in the values,
${b}^{2} = {20}^{2} - {16}^{2}$
${b}^{2} = 400 - 256$
${b}^{2} = 144$
Now just find the square root of both factors,
$\sqrt{ {b}^{2} } = \sqrt{12}$
The value of (DEA) is,
$b = 12$
Now we want to find (d)
Since 12 is the value of the base, then divide it 2 to find (DE), after just repeat the whole process but with the value of hypotenuse 10 instead of 20 since we want to find the smaller triangle,
${a}^{2} = {c}^{2} - {b}^{2}$
Now plug in the value
${a}^{2} = {10}^{2} - {6}^{2}$
${a}^{2} = 100 - 36$
${a}^{2} = 64$
Now find the square root of both factors,
$\sqrt{ {a}^{2} } = \sqrt{64}$
$a = 8$

The value of (d) is (8)

Hope this helped
:D

4 0

2 years ago

Pls help for brainliest

stealth61 [152]

Answer:

70cm2

Please mark

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

There are 25 kids in a class, and the number of boys is 2/3 of the number of girls. How many boys and how many girls are in this

Ksju [112]

25 kids in all
2xboys:3x girls

so the equation would be
2x+3x=25
solve,
5x=25
/5 /5
x=5
2x=10
3x=15

10 boys and 15 girls

3 0

3 years ago

Use the slope formula to find the slope of the line through the points (2,10) and (10,−8).

Salsk061 [2.6K]

The slope formula is the changes of two y-values over/to the changes of two x-values.

$\large \boxed{m = \frac{y_2 - y_1}{x_2 - x_1} }$

Substitute two given points in the formula to find the slope. The m-term represents the slope from y = mx+b.

$\large{m = \frac{10 - ( - 8)}{2 - 10} } \\ \large{m = \frac{10 + 8}{ - 8} } \\ \large{ m = \frac{18} { - 8} \longrightarrow \frac{9}{ - 4} } \\ \large \boxed{m = - \frac{9}{4} }$