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djverab [1.8K]
3 years ago
13

Find the value of x. Round your answer to the nearest tenth.

Mathematics
1 answer:
o-na [289]3 years ago
5 0
Answer should be 4


Explanation: 30 divided by 8 = 3.75

3.75 rounded is 4
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the tens digit of a two digit number is twice the units digit. The sum of the digits is twelve. Find the original number.
KatRina [158]
X - tens digit
y - units digit

x=2y\\
x+y=12\\\\
2y+y=12\\
3y=12\\
y=4\\\\
x=2\cdot4\\
x=8\\\\
10\cdot8+4=\boxed{84}

4 0
3 years ago
Study the Proof: Give the reasons for the missing reason. List the number and then state the reason.
joja [24]
1) Given
2) Adding segments AB and BC together gives AC (Addition postulate, not too sure about the terminology) 
3) Segment Addition postulate 
4) Segment Addition postulate(Knowing that AC=BD, the distance between BC and CD add up to BD, shown in #3. AB and BC add together to give AC) 
5) Subtraction property of Equality 

Hope I helped :) 
6 0
3 years ago
Can I get help with this ​
LUCKY_DIMON [66]

Answer:

i cant awnser it when ist sideways

Step-by-step explanation:

8 0
3 years ago
Help me with #4 pleasedeeee
Romashka [77]

Answer:

\dfrac{dy}{dx}=-\dfrac{2x-y-1}{2y-x-1}

Step-by-step explanation:

Differentiating, you get ...

... x·dy +y·dx +dx +dy = 2x·dx +2y·dy

Collecting terms gives ...

... dy(x +1 -2y) = dx(2x -y -1)

... dy/dx = -(2x -y -1)/(2y -x -1)

4 0
3 years ago
What is 2/5 divided by 3/4 can someone explain me asap
artcher [175]

Answer:

8/15

Step-by-step explanation:

KCF (Keep, Change, Flip)

keep 2/5, change ÷ to ×, flip 3/4 to 4/3

2/5 × 4/3

2×4=8

5×3=15

8/15

Hope it helps :)

3 0
2 years ago
Read 2 more answers
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