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4 years ago

Please someone help with Q4 and Q3 I’m really stuck and not sure if the calculations for Q3 that I’ve done are correct

Mathematics

1 answer:

Vladimir [108]4 years ago

7 0

Answer:

3. x + 18.

4. 8n + 16

Step-by-step explanation:

3. We have to calculate the area of wood present in the frame whose dimensions are given with the question.

Requires area = {(x + 3) × 1} + [(4 - 1) × {(x + 3) - (x - 2)}] = x + 3 + 3 × 5 = x + 18. (Answer)

4. The sum of four consecutive odd numbers where 2n + 1 is the smallest odd number will be

= (2n + 1) + (2n + 3) + (2n + 5) + (2n + 7)

= 8n + 16 (Answer)

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What is the answer to 3x+5=4

PSYCHO15rus [73]

Step-by-step explanation:

3x+5=4

move the positive number to the right side over the equal sign.

NB.lf the number that u moved over is positive(it as a plus sign before it ) the number will become negative when moved over the equal sign. If the number has a minus sign then when it is moved over the equal sign it becomes positive.

so for this because we have a +5.it will then be

3x=4-5

3x=-1

To get x you divide both side by 3

3x/3=-1/3

therefore x =-1/3

3 0

3 years ago

Dave has 25 3/4 feet of piping and needs to cut it in 1 1/2 foot measurements for a project. How many pieces of piping will he e

Ostrovityanka [42]

Answer: 17 1/6 or 17-18

(u guess which is right if its an integer ^^)

Step-by-step explanation:

25 3/4 ÷ 1 1/2

First change the mixed fractions to improper fractions.

25 3/4 = 103/4

1 1/2 = 3/2

Now divide: 103/4 ÷ 3/2

103/4 * 2/3 (multiply by flipping the second fraction)

= 206/12

Now divide: 206 ÷ 12

= 17 2/12 (simplified: 17 1/6)

The answer will be 17 1/6 (OR 17-18)

5 0

1 year ago

How to solve -2(1-7n)-5n=34

OLEGan [10]

-2(1-7n)-5n=34

Multiply the bracket by -2

(-2)(1)=-2

(-2)(-7n)=14n

-2+14n-5n=34

-2+9n=34

Move -2 to the other side. Sign changes from -2 to +2.

-2+2+9n=34+2

9n=34+2

9n=36

Divide by 9 for both sides

9n/9=36/9

n=4

Answer: n=4

6 0

3 years ago

Read 2 more answers

Please help me! Will mark brailest if you are right!!!

Anon25 [30]

Answer:

f(x) = 3x

Step-by-step explanation:

The equation of a line passing through the origin is

y = mx ( m is the slope )

Calculate m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (1, 3)

m = $\frac{3-0}{1-0}$ = 3 , then

y = 3x ← is the equation of the graphed line

8 0

3 years ago

Find the value of x and y (5y-23) (2x+13) (3x) 47

liq [111]

Answer:

x = 24

y = 19

Step-by-step explanation:

7 0

3 years ago