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Solnce55 [7]
3 years ago
11

When would you a subtract in an expression​

Mathematics
1 answer:
masha68 [24]3 years ago
5 0

Answer:

You would need to subtract when:

Step-by-step explanation:

If there is a negative number like 4 -5

If there is a parentheses,

A subtraction sign.

Hope this helps you.

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Point O is the center of the circle in the diagram. What is m∠BCA ?
Eduardwww [97]
M ∠ BOA = 360° - 250° = 110°
The sum of all interior angles of the quadrilateral AOBC is 360°
m ∠ BCA = 360° - ( 110° + 90° + 90° ) = 360° - 290° = 70°
Answer: C ) 70°
3 0
3 years ago
Donna guessed there were 400 jellybeans in a jar. There were really 480 jellybeans. What was her percent of error?
miss Akunina [59]

Answer:

≈83.33%

Step-by-step explanation:

400/480 = 5/6

56 * 100 =  ≈83.33%

4 0
3 years ago
How many liters of glycerin should be added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16%
Naily [24]

1.143 liters of glycerin should be added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16% glycerin.

For given question,

Let x be the quantity ( in liters ) of glycerin added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16% glycerin,

Thus,

Quantity of glycerin in 12 liters + Quantity of glycerin in x

= Quantity of glycerin in resultant mixture.

⇒ 8% of 12 + 100% of x = 16% of (12 + x )

⇒ 0.08 × 12 + x = 0.16 × ( 12 + x )

⇒ 0.96 + x = 0.16 × 12 + 0.16x

⇒ 0.96 + x = 1.92 + 0.16x

⇒ x - 0.16x = 1.92 - 0.96

⇒ 0.84x = 0.96

⇒ x = 1.143 liters

Therefore, 1.143 liters of glycerin should be added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16% glycerin.

Learn more about the resulting solution here:

brainly.com/question/12051765

#SPJ4

7 0
2 years ago
A number is 6 less than its square?
Simora [160]
3 is 6 less than its square.

3^2 = 9

9-3 = 6

I hope this helps!
7 0
4 years ago
Read 2 more answers
Write an equation and solve. Round to the nearest hundredth where necessary. What is 35% of 63?
DanielleElmas [232]
22.05

35/100=.35 .35x63=22.05
7 0
3 years ago
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