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astraxan [27]
3 years ago
13

Which equation results from adding the equations in this system? 11 x minus 3 y = negative 17. Negative 4 x + 3 y = negative 18.

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
4 0

Answer:

7x = - 35

Step-by-step explanation:

Equation 1 :

11x - 3y = - 17

Equation 2 :

-4x + 3y = - 18

Equation 1 + 2

11x - 3y = - 17

-4x + 3y = - 18

_____________

11x - 4x - 3y + 3y = - 17 + (-18)

7x = - 35

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2.5y; when y = -5.2
attashe74 [19]
The answer is -13. You figure it out by multiplying 2.5×-5.2=13
7 0
2 years ago
Simplify 7m - 11n - n + 5m.
goblinko [34]

Answer:

The simplified form of the given expression is 12(m -n).

Step-by-step explanation:

The given expression is

7m - 11n - n + 5m

We need to simplify the given expression.

Rearrange the terms according to the variables.

7m+5m - 11n - n

On combining like terms, we get

(7m+5m)+( - 11n - n)

On simplification, we get

(12m)+( -12n)

12m -12n

Taking GCF common.

12(m -n)

Therefore the simplified form of the given expression is 12(m -n).

5 0
3 years ago
Round the following numbers<br> to the nearest len<br> 1)7<br> 2)23<br> 3)1.562
Drupady [299]

1) 7 = 7.0

2) 23 = 23.0

3) 1.562 = 1.6

4 0
2 years ago
Read 2 more answers
Dave is comparing the circumferences of several trees in his yard. The oak tree is 0.539 meters in circumference, the ash tree h
stepan [7]

Answer:   c. elm

Step-by-step explanation:

Given : The circumference of the oak tree= 0.539 meters

=0.539\times100=53.9\text{ cm}   [∵ 1 m = 100 cm]             (1)

The circumference of the ash tree= 0.509 yards

=0.509\times3\text{ feet}   [∵ 1 yard = 3 feet]

=0.509\times3\times 30.48\text{ cm}  [∵ 1 foot = 30.48 cm]

=46.54296\approx46.54\text{ cm}        (2)

The circumference of the elm tree = 6281.70 millimeters

=\dfrac{6281.70}{10}=628.17\text{ cm}          (3)

The circumference of the poplar tree = 0.000385 miles

=0.000385 \times5280\text{ feet}   [∵ 1 mile = 5280 feet]

=0.000385 \times5280\times30.48\text{ feet}  [∵ 1 foot = 30.48 cm]

=61.959744\approx61.96\ \text{ cm}              (4)

From (1) , (2) , (3 ) and (4) it is clear that

46.54< 53.9 < 61.96 < 628.17

Hence, the elm tree has the greatest circumference.

5 0
3 years ago
Twice a number is increased by 3 is 7
lys-0071 [83]
7-3=4 

4/2=2

The answer is 2
6 0
3 years ago
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