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Triss [41]
3 years ago
5

Which expressions are equivalent to 10a - 25 + 5b

Mathematics
1 answer:
sergey [27]3 years ago
5 0

Answer:

<h2>(2a − 5 + b) · 5</h2><h2>10×(a − 2.5 + 0.5b)</h2><h2>(−2a + 5 − b) ⋅ (−5)</h2>

Step-by-step explanation:

10a-25+5b\\\\-2(-5a-25+5b)=(-2)(-5a)+(-2)(-25)+(-2)(5b)\\=10a+50-10b\qquad NOT\\\\(2a-5+b)(5)=(2a)(5)+(-5)(5)+(b)(5)=10a-25+5b\qquad YES\\\\10(a-2.5+0.5b)=(10)(a)+(10)(-2.5)+(10)(0.5b)\\=10a-25+5b\qquad YES\\\\(-2a+5-b)(-5)=(-2a)(-5)+(5)(-5)+(-b)(-5)\\=10a-25+5b\qquad YES\\\\-10(-a-2.5-0.5b)=(-10)(-a)+(-10)(-2.5)+(-10)(-0.5b)\\=10a+25+5b\qquad NOT

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Which of the following numbers can be expressed as a decimal that<br> terminates 9/7 5/3 3/2 6/4
podryga [215]

Answer:

Last 2 terminate

Step-by-step explanation:

9/7 does not terminate: 1.285724285724285724...

5/3 does not terminate: 1.66666666666666666...

3/2 does terminate: 1.5

6/4 same thing as 3/2 = 1.5

C and D terminate.

8 0
2 years ago
Help please. Having some trouble with this question
xeze [42]

Answer:

The answer to your question is 55 ft

Step-by-step explanation:

Data

Person's height = 5 ft

Person's shadow = 10 ft

Tree's height = ?

Tree's shadow = 110 ft

- Use the Thales' theorem to solve this problem

 Person's height / Person's shadow = Tree's height / Tree's shadow

- Substitution

                     5 / 10 = x / 110

-Solve for x

                     x = 5 (110) / 10

-Simplification

                     x = 550 / 10

-Result

                     x = 55 ft

-Conclusion

The tree is 55 ft height

5 0
2 years ago
What is the value of n in the equation; 3n - 8 = 32 - n?
Marrrta [24]
N=10
3n-8=32-n
+8 +8
3n=40-n
+n +n
4n=40
Divide
n=10
7 0
3 years ago
PLEASE HURRY I HAVE NO TIME LEFT
Viktor [21]

Answer:

ok because I said ok and ok means ok

4 0
3 years ago
How do you find surface area of a rectangle prism
anastassius [24]
The formula to find it is 2(l x h + h x w + w x l) = SA in which l = length, h = height, and w = width. 

Hope this helps!
4 0
3 years ago
Read 2 more answers
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