Solve for d. 2d+3=7d+18

Mathematics

2 answers:

Vladimir [108]2 years ago

6 0

Answer: -3.

Explanation:
2(-3)+3=7(-3)+18
-6+3=-21+18
-3=-3

algol [13]2 years ago

5 0

Answer: d = -3

Step-by-step explanation:

2d+3=7d+18

-5d=15

d=-3

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Select the two values of x that are roots of this equation.<br> 2x2 + 7x + 6 = 0

SVEN [57.7K]

Hopes this helps:

Answer: x = -10/7

1. Simplify 2 • 2 to 4
4 + 7x + 6 = 0

2. Simplify 4 + 7x + 6 to 7x + 10.
7x + 10 = 0

3. Subtract 10 from both sides.
7x = -10

4. Divide both sides by 7.
X = -10/7

3 0

2 years ago

Solve by factoring, help

zubka84 [21]

Answer:

$x = - 4 \\ x = - 7$

Step-by-step explanation:

$x {}^{2} + 28 = - 11x \\ x {}^{2} + 11x + 28 = 0 \\ x {}^{2} + 7x + 4x + 28 = 0 \\ x(x + 7) + 4(x + 7) = 0 \\ (x + 4)(x + 7) = 0 \\ \\ x = - 4 \: \: \: \: \: \: \\ \: x = - 7$