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ivann1987 [24]
2 years ago
13

The sum of two numbers is 39. Their difference is 21. What are the two numbers?

Mathematics
2 answers:
Yanka [14]2 years ago
6 0

Answer:

30 and 9

Eeexplination;

mrs_skeptik [129]2 years ago
4 0

Answer:

30 and 9

Step-by-step explanation:

x+y=39 , x-y=21

Solve for x:

x+y=39 , x-y=21

x= 30

Substitute x with 30:

(30)+y=39 , (30)-y=21

Solve for y:

y=9

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FrozenT [24]

Answer:

#1

<u>Area of triangle backdrop:</u>

  • A = 1/2bh = 1/2(10.5)(8.5) = 44.63 m²

<u>Area of the cloth:</u>

  • A = 4.5*4 = 18 m²

<u>Uncovered area:</u>

  • 44.63  - 18 = 26.63 m²

Choice A

#2

<u>Area of the cut piece:</u>

  • A = πr² = 3.14*7.6² = 181.37 cm²

<u>Area of the square piece:</u>

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<u>Remaining piece is:</u>

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8 0
2 years ago
Evaluate the expression when y=-6.<br> y² +8744
Sergeu [11.5K]

Answer:

8780.

Step-by-step explanation:

-6 times -6 is 36 + 8744

8 0
3 years ago
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Let e be the line through A (-4,5) and B (3. t) that is perpendicular to the line through
grigory [225]

Answer:

Step-by-step explanation:

product of slopes of perpendicular lines=-1

(t-5)/(3+4)×(2-3)/(-4-1)=-1

(t-5)/7×(-1/-5)=-1

(t-5)/35=-1

t-5=-1×35=-35

t=-35+5

t=-30

2.

slopes of parallel lines are equal.

(-2+3)/(t-4)=(-1-4)/(4+2)

1/(t-4)=-5/6

t-4=-6/5

t=4-6/5=(20-6)/5=14/5

3.

x>0,y<0

so P lies in4th quadrant.

except cos and sec all are negative.

so only cos and sec are positive.

8 0
3 years ago
The sum of a number and five divided by fifteen
natta225 [31]

Answer:

Option F

Step-by-step explanation:

Let the number be n.

Sum of a number and 5 is n + 5.

Sum of a number and five divided by fifteen is

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2 years ago
If x and x+30 are the pair of co - interior angle​
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