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andrew-mc [135]
3 years ago
11

Translate to a system of equations and solve.

Mathematics
2 answers:
hoa [83]3 years ago
5 0

Step-by-step explanation:

sksjjd

ksjshdjdeiejo

luda_lava [24]3 years ago
5 0

Answer:

12 and 15

Step-by-step explanation:

Let the numbers be called x and y.  We know from the first sentence that:

x + y = 27.

From the second sentence we know that x + 3 = y. (In this problem it does not matter which is x and which is y.)

Substituting in x + 3 into the first equation, we have

x + x + 3 = 27

2x + 3 = 27

2x + 3 - 3 = 27 - 3

2x = 24

x = 12

y = x+ 3 = 15

Check: does x + y = 27?  Yes, 12 + 15 = 27

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On average, seawater contains approximately 1.2 ounces of salt per liter.how many gallons of seawater to the nearest tenth of a
Andru [333]

Answer:

10.6

Step-by-step explanation:

The amount of salt in one liter is 1.2 ounces, meaning to make one pound (16 oz) it would take 13 1/3 liters of water.

For 2.5 pounds, it would be 2.5*16, or 40-- 40 liters for 2.5 pounds of salt.

40 liters in (U.S.) gallons is 40/ (approximately) 3.785 , or 10.5680, 10.6

3 0
3 years ago
Solve for x: 2/7(x-2) = 4x
zheka24 [161]

Answer:

2/7(x-2)=4x

(2×x-2×2)/7 = 4x

(2x-4)/7 = 4x

2x-4×(1) = 4x × 7 ( Cross multiply)

2x-4 = 28

2x = 32

2x÷2 = 32÷2

x=16

8 0
2 years ago
Sorry this a lot.
raketka [301]
Your
<span>-4| 3 7 -20
-12 20
______________
3 -5 0
is a bit hard to read.  Try this format:
      __________
-4  /   3    7    -20
              -12   20
      -------------------
         3    -5      0

Because the remainder is 0, we know that -4 is a root and (x+4) is a factor.  Note the new coefficients in the last row:    3   -5.  They are the coeff. of the quotient, namely, 3x-5.  So (3x-5) is a factor of the original polynomial.
      

</span>
5 0
3 years ago
Read 2 more answers
Factor the polynomial using the greatest common factor.<br> x^2+3x
kow [346]

x²+3x

= x×x+3×x

= x(x+3)

8 0
2 years ago
How many terms are in <br> 3(n - 5) + 7y and<br> -2(3x +5) + 10 (a + b)
Sholpan [36]
3(n-5)+7y has 2 terms.

-2(3x+5)+10(a+b) has also 2 terms. Because they are doing distributive property, they only count as 1 term all together. :)
5 0
3 years ago
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