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patriot [66]
3 years ago
7

Which statement describes the concept of number sense?

Mathematics
1 answer:
irina [24]3 years ago
6 0
D. an ability to understand numbers and their relationships
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17000 spent on expenses if that amount is 58.6% of total income how much is made a year
belka [17]

Answer:

Step-by-step explanation:

58.6% of the total income is 17,000

let x represent the total income

58.6%(x) = 17,000...turn ur percent to a decimal

0.586x = 17,000

x = 17,000 / 0.586

x = 29010.238 rounds to 29,010.24 <== total yearly income

check...

58.6% of 29,010.24 = 17,000

0.586(29,010.24) = 17,000

17,000 = 17,000 (correct)

5 0
4 years ago
5x + 2y=7<br> - 2x + 6y=9
ollegr [7]

Answer:

x = \frac{12}{17} or 0.706

y = \frac{59}{34} or 1.735

Step-by-step explanation:

5x + 2y=7    ----->(eq 1)

- 2x + 6y=9 ----->(eq 2)

Multiply (eq 1) with 3

3×(5x + 2y) = 3×7  

15x + 6y = 21  ----->(eq 3)

substract (eq 3) from (eq 2)

- 2x + 6y - (15x + 6y) = 9-21

- 2x + 6y - 15x - 6y = 9-21

- 2x - 15x + 6y - 6y = 9-21

-17x = -12

x = -12 ÷ -17

x = \frac{12}{17}

put x = \frac{12}{17} in (eq 1)

5*\frac{12}{17} + 2y = 7

2y = 7- 5*\frac{12}{17}

2y = \frac{7*17 - 60}{17}

2y = \frac{119- 60}{17}

2y = \frac{59}{17}

y = \frac{59}{17*2}

y = \frac{59}{34}

6 0
4 years ago
What is the relationship between the ratios? 10/24 and 5/12 Drag and drop to complete the statement. The ratios are proportional
Sunny_sXe [5.5K]
5/12 multiplied by 2 equals 10/24 which when divided by 2 it equals 5/12
3 0
4 years ago
Find the measure of the arc or angle indicated. Part 1. NO LINKS.​
andreev551 [17]

Answer:

Step-by-step explanation:

1)

O = center of circle (origin)

we know that the angle at the center of the circle ∠ ROS will be

180= 2(31) + ∠x

180-62 = ∠x

118° = ∠x

The supplemental angle to the 118° will be 62°

62° is the interior angle to  arc QR , so

arc QR is also 62°

3)

b/c the intercepted arc YZ = 2* 68=136

then 136+125+? = 360

? = 99°

arc ZX = 99°

5)

O= center point

we are given the two arcs  120 and 70 for both of these we know that the

interior angles will be the same.  ∠JOX  has a central angle of 120 , then

b/c triangle JOX is an isosceles,  we know that the two angles J and X of

the triangle JOX will be 1/2 of  60 , or 30 each

also for    

also ∠XOY has an interior angle of 70 so the two angle at X and Y will be 1/2 of 110 , or 55°

now add 55+30 to find X for box XYZJ

85° = ∠X  

5 0
4 years ago
Read 2 more answers
Given right triangle ABC with altitude BD drawn to hypotenuse AC. If AD = 12
Dmitry [639]

Answer:

x = 6

Step-by-step explanation:

let 'x' = BD

x/3 = 12/x

x² = 36

x = \sqrt{36}

x = 6

5 0
4 years ago
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