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sveticcg [70]
3 years ago
7

How do mental math strategies help you solve problems such as the ones above?

Mathematics
1 answer:
Luden [163]3 years ago
7 0

With mental math, you can perform equations quickly and efficiently. They also help you to develop your own strategies and solve more complex math equations. Hope this helps;)


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Tell whether the angles are adjacent or vertical. Then find the value of x.
krok68 [10]

Answer : The angles are vertical angles and the value of x is 25^o

Step-by-step explanation :

Adjacent angles : It is defined as the two angles that have the common arm and common vertex.

Vertical angles : It is defined as the two lines intersect each other and form angles. The opposite angles are known as vertically opposite angles.

And we know that the vertically opposite angles are equal.

In the given image, the angles are vertical angles and vertically opposite angles are equal.

So,

(4x-25)^o=75^o

4x-25^o=75^o

4x=75^o+25^o

4x=100^o

x=\frac{100^o}{4}

x=25^o

Therefore, the angles are vertical angles and the value of x is 25^o

6 0
3 years ago
"four times the difference of a number and 9 is -30"
lesantik [10]

Answer:

4 * (x-9)=-30

not sure if u want it solved but if u do its x=6/4

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
This is the least question of the day for me<br><br><br> Please help me :D
Rufina [12.5K]

Answer: i got 394

Step-by-step explanation:

3 0
3 years ago
38 ONLY-Please help me answer the following Questions and will give thx or stars
Simora [160]

Answer:

8, 133, 47, 43, 90 (remember to put degree symbols!)

Step-by-step explanation:

i added all of the work and explanations in this files! if you still have questions feel free to comment or message :)

3 0
3 years ago
Please help. ASAP. This is so confusing.
Anni [7]

1. right triangle?

-> c²= g²+b²

c²= 20²+21²

c²= 841

c=V841

c=29

-> triangle BCG is right

2.

cos B= 20/29

tan B= 21/20

sin B= 21/29

sin G= 20/29

cos G= 21/29

tan G= 20/21

3 0
2 years ago
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