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3 years ago

6

Subtract (x² + 5x – 6) – (3x^2 – 7x + 1). What is the difference?

1 answer:

Lorico [155]3 years ago

4 0

1. Distribute the Negative Signs
2. Combine like terms
-2x^2 + 12x-7

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The sum of the following algebraic expression 2x + 15, 7-8x and 3x - 41 is 30 find the value of x..

Ksju [112]

$\\ \tt \longmapsto2x + 15 + 7 - 8x + 3x - 41 = 30 \\ \\ \tt \longmapsto 2x - 8x + 3x + 15 + 7 - 41 = 30 \\ \\ \tt \longmapsto - 3x - 19 = 30 \\ \\ \tt \longmapsto 3x + 19 = - 30 \\ \\ \tt \longmapsto 3x = - 30 -19 \\ \\ \tt \longmapsto 3x = - 49 \\ \\ \tt \longmapsto x = - \frac{49}{3}$

3 0

3 years ago

Read 2 more answers

Using the sine rule, calculate the length y. Give your answer to 2 s.f.

Tpy6a [65]

Answer:

y = 9.84 mm

Step-by-step explanation:

<h2>Sine rule:</h2>

Law of sine:

$\sf \boxed{\bf \dfrac{a}{Sin \ A}=\dfrac{b}{Sin \ B}= \dfrac{c}{Sin \ C}}$

a = y

A = 31°

b = 17 mm

B = 117°

$\sf \dfrac{y}{Sin \ 31^\circ}=\dfrac{17}{Sin \ 117^\circ}\\\\$

$\sf y = \dfrac{17}{Sin \ 117^\circ}*Sin \ 31^\circ\\\\ y = \dfrac{17}{0.89}*0.515\\\\y = 9.84 \ mm$

8 0

2 years ago

Mia spins the spinner two times. what is the probability that the arrow will land on 2 both times

kolezko [41]

Answer

how many sides are there to the spinner?

Step-by-step explanation:

i need to knowhow many there are in order to give you a probibility

4 0

3 years ago

Brainliest to the first CORRECT answer, Thanks

kotykmax [81]

Answer:

28 inches

Step-by-step explanation:

P = 2 (a + b) = 2 · (6 + 8) = 28

5 0

3 years ago

Which of the following verbal expression represents the algebraic expression x/2+5

ycow [4]

It would be 5 more than half of a number.

6 0

3 years ago