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Stolb23 [73]
3 years ago
15

Solve.

Mathematics
2 answers:
drek231 [11]3 years ago
5 0

Answer:

The solution is (4, 1).

Step-by-step explanation:

Our system is

\left \{ {{2d-e=7} \atop {d+e=5}} \right.

Since the coefficients of e are the same, we will add the two equations together to cancel it:

\left \{ {{2d-e=7} \atop {+(d+e=5)}} \right. \\\\3d=12

Divide both sides by 3:

3d/3 = 12/3

d = 4

Substitute this into the second equation:

4+e=5

Subtract 4 from each side:

4+e-4=5-4

e = 1

This makes the point (4, 1).

horrorfan [7]3 years ago
4 0
.hello : 
<span>2d−e=7....(1)
d+e=5.....(2)
(1)+(2) : 3d=12
d=4
subsct in (2) : 
4+e=5
e=1
conclusion : 
</span><span>The solution is (4, 1).</span><span>

</span>
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What is 1 1/4 + 3 3/8 = pls show your work
Dahasolnce [82]

Answer:

Exact form: 37/8 Decimal form: 4.625 Mixed number form: 4 5/8

Step-by-step explanation:

dd the whole numbers first.

4+\frac{1}{4}+\frac{3}{8}

4+

4

1

​

+

8

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​

2 Find the Least Common Denominator (LCD) of \frac{1}{4},\frac{3}{8}

4

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. In other words, find the Least Common Multiple (LCM) of 4,84,8.

LCD = 88

3 Make the denominators the same as the LCD.

4+\frac{1\times 2}{4\times 2}+\frac{3}{8}

4+

4×2

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​

+

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3

​

4 Simplify. Denominators are now the same.

4+\frac{2}{8}+\frac{3}{8}

4+

8

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​

+

8

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5 Join the denominators.

4+\frac{2+3}{8}

4+

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6 Simplify.

4\frac{5}{8}

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3 years ago
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Answer:

(b) 36 degrees.

Step-by-step explanation:

K is the center of the circle so triangle KMN is isosceles and m < KMN = m KNM =  26 degrees ( base angles are equal)

So m <  LMK = m <LMN - m < KMN

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= 72 degrees.

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Which of the following is a solution to the differential equation xy′−3y=6 ?
ololo11 [35]

Answer:

y = 5 {x}^{3}  - 2

Step-by-step explanation:

The given differential equation is :

xy′−3y=6

We want to determine which of the following options is a solution to the differential equations.

The function that satisfies the differential equation is a solution.

We can verify that

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We substitute the function and its derivative into the differential equation to get:

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This simplifies to:

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