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irinina [24]
2 years ago
11

A number is doubled and then increased by seven. The result is seventy-one. What is the original number?

Mathematics
1 answer:
marissa [1.9K]2 years ago
6 0

Answer:

i think its 43

Step-by-step explanation:

2 x X + 7 = 93

substract 7 from both sides then divide both sides by 2

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If the radius of a circle equals 20 cm find its circumference correct to one decimal place
Brums [2.3K]

Answer:

125.66

Step-by-step explanation:

i don't get the one decimal place part but there your answer

3 0
3 years ago
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11. Sam has to pay a 15% tax on a boat that cost him $500. He believes he can determine the tax
vlada-n [284]

Answer:

75

Step-by-step explanation:

7 0
3 years ago
Gina went to a restaurant for lunch. On her bill the sales tax equals $2.34. If the tax is 8.5%, what was the subtotal (without
bagirrra123 [75]

Answer:

$2.5389

Step-by-step explanation:

Given data

Cost of lunch = $2.34

Tax= 8.5%

Let us compute the cost of the tax

=8.5/100*2.34

=0.085*2.34

= $0.1989

Hence the total is = 0.1989+2.34

=$2.5389

4 0
3 years ago
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Citrus2011 [14]
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6 0
3 years ago
Help me please TT,,,,,
tekilochka [14]

Answer:

The value of ∠A is 62° ⇒ c

The value of ∠B is 54°⇒ d

Step-by-step explanation:

<em>In a triangle, the measure of an exterior angle at a vertex of the triangle equals the sum of the measures of the two opposite interior angles to this vertex.</em>

<em />

In Δ ABC

∵ The measure of the exterior angle at the vertex C = 116°

∵ The opposite interior angles to vertex C are ∠A and ∠B

∵ m∠A = (3x - 13)°

∵ m∠B = (2x + 4)°

→ By using the rule above

∴ (3x - 13) + (2x + 4) = 116

→ Add the like terms in the left side

∵ (3x + 2x) + (-13 + 4) = 116

∴ 5x + -9 = 116

∴ 5x - 9 = 116

→ Add 9 to both sides

∵ 5x - 9 + 9 = 116 + 9

∴ 5x = 125

→ Divide both sides by 5

∴ x = 25

→ To find the measures of angle A and B substitute x in their

   measures by 25

∵ m∠A = 3(25) - 13 = 75 - 13

∴ m∠A = 62°

∴ The value of ∠A is 62°

∵ m∠B = 2(25) + 4 = 50 + 4

∴ m∠B = 54°

∴ The value of ∠B is 54°

5 0
3 years ago
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