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zubka84 [21]
3 years ago
15

4 algebra 1 questions if you know the answers please try to get me to understand

Mathematics
2 answers:
asambeis [7]3 years ago
3 0

Distribute each term in one parenthesis to the other terms in the other parenthesis.

(x - 2) (2x + 3)

First, distribute x. When distributing, multiply

x(2x) = 2x²

x(3) = 3x

Next, distribute the other term, -2. Remember to change the signs.

-2(2x) = -4x

-2(3) = -6

-------------------------------------------------------------------------------------------------------------------

2x² + 3x - 4x - 6

Combine like terms

3x - 4x = -x

2x² - x - 6

-------------------------------------------------------------------------------------------------------------------

2x² - x - 6 is your answer

hope this helps

Goryan [66]3 years ago
3 0

In order to distribute be sure to use the F.O.I.L method! Here's my work to help:

FOIL = first, outer, inner, last

1. (x-2)(2x+3)--- multiply the first values in both parentheses to get 2x^2.

2. Multiply the outer values (x and 3) to get 3x

3. Multiply the inner values (-2 and 2x) to get -4x

4. Multiply the last values (3 and -2) to get -6.

5. Place all the values together and then simplify by combining like terms...

2x^2 -3x - 4x -6 which simplifies to your final answer of 2x^2-x-6. Hope this helped :))

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2x+ 3 / 5= y<br> rearrange to make x the subject
Elza [17]

Answer:

<h3>(5y-3)/2</h3>

Step-by-step explanation:

Given the equation 2x+ 3 / 5= y

Cross multiply

2x+3 = 5 * y

2x+3 = 5y

Subtract 3 from both sides

2x+3-3 = 5y - 3

2x = 5y-3

Divide both sides by 2

2x/2 = (5y-3)/2

x = (5y-3)/2

Hence the value of x is (5y-3)/2

4 0
3 years ago
You are riding along a straight river from east to the west at speed of 160m/m. At a given time, you will see the bearing of a c
yuradex [85]

Using the given information, the width of the river is 505.96 m

<h3>Bearing and Distances</h3>

From the question, we are to determine the width of the river

Consider the given diagram,

Let F be the first position of the biker

S be the second position

and C be the position of the church

First, we will determine the distance covered from F to S

Speed = 160m/min

Time = 4 minutes

Using the formula,

Distance = Speed × Time

Distance covered = 160 × 4

Distance covered = 640 m

That is, /FS/ = 640 m

Now, consider ΔFSC

∠F = 90° - 70° = 20°

∠S = 90° + 56° = 146°

and ∠C = 180° - 20° - 146° = 14°

By the Law of Sines

\frac{/FC/}{sin\ S}= \frac{/FS/}{sin\ C}

∴ \frac{/FC/}{sin\ 146^\circ}= \frac{640}{sin\ 14^\circ}

/FC/ =\frac{640 \times sin \ 146^\circ}{sin \ 14^\circ}

/FC/ = 1479.33 m

Now,

By SOH CAH TOA

cos \ 70^\circ = \frac{d}{/FC/}

NOTE: d is the width of the river

∴ d = /FC/ × cos70°

d = 1479.33 × cos70°

d = 505.96 m

Hence, the width of the river is 505.96 m

Learn more on Bearing and distances here: brainly.com/question/19351991

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7 0
2 years ago
What’s 11 divide by 3 and 2/3
Archy [21]

Answer:

3

Step-by-step explanation:

8 0
3 years ago
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Multiply two and four-fifths negative five and two-thirds
lisabon 2012 [21]

Answer:

-15 13/15

Step-by-step explanation:

I used a calculator

3 0
3 years ago
Read 2 more answers
What is the product of 2x - 5 and 3x2 + 5x - 7? Write your answer in standard form.
andrew11 [14]

Answer:

a) 6x³ − 5x² − 39x + 35

b) no

Step-by-step explanation:

(2x − 5) (3x² + 5x − 7)

Distribute:

3x² (2x − 5) + 5x (2x − 5) − 7 (2x − 5)

Distribute again:

6x³ − 15x² + 10x² − 25x − 14x + 35

Combine like terms:

6x³ − 5x² − 39x + 35

5x − 2 is the opposite of 2x − 5, so you would get the negative of the answer from part (a).

8 0
3 years ago
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