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Arturiano [62]
3 years ago
15

Which ordered pair makes the equation true? 4x – 9y = –5 (–5, –2) (–1, 1) (10, 5) (20, 4)

Mathematics
1 answer:
mihalych1998 [28]3 years ago
8 0
(10,5) would make the equation correct
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Simplify the expression. 18a + 12x − 12a + 15x A) 6a + 27x B) 6a − 3x C) 30a − 18x D) −30 −3x
Vinvika [58]

Answer:

18a + 12x - 12a + 15x

6a + 27x

the answer is a

Step-by-step explanation:

6 0
3 years ago
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a cube measuring 1 cm on each side, what is the volume, if the cube was dropped into 28ml of water. what would the new volume be
meriva

Answer:

29 ml

Step-by-step explanation:

Vcube = 1cm×1cm×1cm = 1 cm³

1 cm³ = 1 ml

If this cube is dropped into a 28ml of water the new reading will be 29 ml.

hope this helped :)

5 0
3 years ago
In the pulley system shown in this figure, MQ = 30 mm, NP = 10 mm, and QP = 21 mm. Find MN.
ankoles [38]
<h2>Answer:</h2>

\boxed{\overline{MN}=37.96}

<h2>Step-by-step explanation:</h2>

For a better understanding of this problem, see the figure below. Our goal is to find \overline{MN}. Since:

\angle MRS=\angle MQP=90^{\circ} \\ \\ \overline{MQ}=\overline{MR}=30mm

and \overline{MN} is a common side both for ΔMRN and ΔMQN, then by SAS postulate, these two triangles are congruent and:

\overline{RN}=\overline{QN}

By Pythagorean theorem, for triangle NQP:

\overline{QN}=\sqrt{\overline{NP}^2+\overline{QP}^2} \\ \\ \overline{QN}=\sqrt{10^2+21^2} \\ \\ \overline{QN}=\sqrt{541}

Applying Pythagorean theorem again, but for triangle MQN:

\overline{MN}=\sqrt{\overline{MQ}^2+\overline{QN}^2} \\ \\ \overline{MN}=\sqrt{30^2+(\sqrt{541})^2} \\ \\ \boxed{\overline{MN}=37.96}

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3 years ago
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andriy [413]
How do I need help like fr
8 0
2 years ago
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Evaluate 2(5 + x^2)+ y if x = 3 and y = 2
11Alexandr11 [23.1K]

Answer:

30

Step-by-step explanation:

Start by substituting

2(5+3²) +2 = ___

Parenthesis

3²= 3 · 3 = 9

add that to 5 = 14

2(14) +2 = ___

2 times 14 = 28.

28 + 2 = 30

3 0
2 years ago
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