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Licemer1 [7]
3 years ago
13

Explain how use mental math in 17+38

Mathematics
1 answer:
asambeis [7]3 years ago
7 0
You would first look at the tens place numbers; 10 and 30. and add them together making 40. after that you'd take the ones places and add them together; 7 and 8. add those together and you'd get 15. to finish you just need to add the two numbers together 40 and 15.
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What is the correct method to label a segment with endpoint E and endpoint F? 
Degger [83]

Answer : option B

the correct method to label a segment with endpoint E and endpoint F

The endpoints of the line are E  and F

The Line starts at  E  and ends at F. The line will not extend after F

The line having end points are called as line segment

We represent a line segment by putting a line at the top

to label a segment with endpoint E and endpoint F, we use EF  or FE and a line at the top

So answer is option B

4 0
3 years ago
Read 2 more answers
Hilda was simplifying some numerical expressions and made each of the following sequences of calculations. Name the mathematical
Galina-37 [17]

Answer:

Problem 1:

5 · (−4/3) · (2/5)

= (−4/3) · 5 · (2/5)   <em>Conmutative Property of Multiplication</em>

= (−4/3) · (5 · (2/5))  <em>Associative Property of Multiplication</em>

= (−4/3) · (2/1) = −8/3 = −2*2/3<em> Multiplied fractions and extracted common factor</em>

Problem 2:

17 + 29 + 3+ 1

= 17 + 3 + 29 + 1  <em>Conmutative Property of Addition</em>

= (17 + 3) + (29 + 1)  <em>Associative Property of Addition</em>

= 20 + 30 Added groups

= 50 Added terms

Step-by-step explanation:

<u>For the Problem 1:</u>

In the first step, Hilda applied the <em>Conmutative Property of Multiplication</em>, because she changed the order of the numbers in the product

In the second step, she applied the <em>Associative Property of Multiplication, </em>because she agrouped the product of 5 and<em> </em>2/5 to perform it sepparately

In the third step, she calculated<em> the product of the fractions</em> -4/3 and 2/1, then she extracted 2 as a <em>common factor</em> to express the fraction as -2*2/3

<u>For the Problem 2:</u>

In the first step, Hilda applied the <em>Conmutative Property of Addition, </em>because she changed the order of the numbers in the sum

In the second step, she applied the<em> Associative Property of Addition, </em>because she associated the addition of 17 and 3 and the addition of 29 and 1, to calculate them in groups.

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4 0
3 years ago
Read 2 more answers
F(x)= sin(arctanx). find the range of f.
Scrat [10]
Answer is in the attachment below.

-1<f(x)<1

5 0
3 years ago
Find the greatest common factor of the<br> following monomials:<br> 15r25<br> 48353
Cerrena [4.2K]

Answer:

475r35

Step-by-step explanation:

3 0
3 years ago
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***no links please***
prisoha [69]

Answer:

3(pi)

Step-by-step explanation:

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sqrt(64) = 8

Answer: 3(pi)

4 0
3 years ago
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