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den301095 [7]
3 years ago
7

How does knowing 8+5=13 help you solve 13-5?​

Mathematics
2 answers:
amid [387]3 years ago
8 0

Answer:

Fact Families

Step-by-step explanation:

They are fact families

insens350 [35]3 years ago
7 0

Answer:

because 8 + 5 = 13 which means that 13-5 =8

Step-by-step explanation:

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Please help me I don’t know what to do
padilas [110]

X = 180° - (73° + 42°)

= 180° - 115°

X = 65°

Y = 180° - 131°

Y = 49°

→ 180° - (X + Y) =

→ 180° - (65° + 49°) =

→ 180° - 114° = 66°

Z = 180° - 66°

Z = 114°

8 0
3 years ago
Can you help me with this please!?
Natalija [7]

9514 1404 393

Answer:

  (a)  2021

Step-by-step explanation:

The expression can be simplified.

  \displaystyle\frac{a^4+b^4+2a^2b^2+a^3b+ab^3}{a^2+b^2}+ab=\frac{(a^2+b^2)^2+ab(a^2+b^2)}{a^2+b^2}+ab\\\\=a^2+b^2+ab+ab=(a+b)^2\\\\=(\sqrt{2021})^2=\boxed{2021}

7 0
3 years ago
St lies on the coordinate plane with s located at (3.2). The midpoint of dt is z(3,9) state the location of the endpoint T thank
77julia77 [94]

Answer:

T = (3,16)

Step-by-step explanation:

The midpoint formula is just another version of the pythagorean theorem, and it states that the midpoint between (x1,y1) and (x2,y2) is \left(\frac{x_1+x_2}{2}\right),\:\left(\frac{y_1+y_2}{2}\right)

Substituting what we know:

endpoint S is (3,2) and endpoint T is (x2,y2)

Midpoint Z is (3,9). We will apply the formula -- backwards.

\left(\frac{3+x_2}{2}\right)=3, solving with algebra we get x2 = 3

So the x-coordinate of endpoint T is 3.

\left(\frac{2+y_2}{2}\right)=9\quad, solving with algebra, we get y2 = 16.

So the y-coordinate of endpoint T is 16.

So the location of endpoint T is (3,16)

4 0
3 years ago
Image attached with question.
butalik [34]

Answer:

x=3 5x+2=17

Step-by-step explanation:

8 0
3 years ago
Can you guys please help me
VARVARA [1.3K]

Answer:

Number 1 I think sorry if I am incorrect.

8 0
3 years ago
Read 2 more answers
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