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forsale [732]
3 years ago
15

-4=3" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
Likurg_2 [28]3 years ago
6 0

Answer:

x = 22

Step-by-step explanation:

<u>Step 1:  Add 4 to both sides</u>

<u />\sqrt{2x + 5}-4+4=3+4

\sqrt{2x+5}=7

<u>Step 2:  Square both sides</u>

<u />(\sqrt{2x+5})^2 = 7^2

2x+5 = 49\\

<u>Step 3:  Subtract 5 from both sides</u>

<u />2x + 5 - 5 = 49 - 5\\

2x = 44

<u>Step 4:  Divide both sides by 2</u>

<u />2x / 2 = 44 / 2\\

x = 22

Answer:  x = 22

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What is the answer to 3/4 / 1/8?
Nataly [62]

Answer:

6

Step-by-step explanation:

\frac{3}{4}  \div  \frac{1}{8}  \\  =  \frac{3}{4}  \times 8 \\  = 3 \times 2 \\  = 6

4 0
2 years ago
Read 2 more answers
3y=11-2x, 3x=y-11 linear equation solve using the algebraic method check solution
tamaranim1 [39]

Answer:

(x, y) = (- 2, 5)

Step-by-step explanation:

given the 2 equations

3y = 11 - 2x → (1)

3x = y - 11 → (2)

Rearrange (2) expressing y in terms of x

add 11 to both sides

y = 3x + 11 → (3)

Substitute y = 3x + 11 into (1)

3(3x + 11) = 11 - 2x

9x + 33 = 11 - 2x ( add 2x to both sides )

11x + 33 = 11 ( subtract 33 from both sides )

11x = - 22 ( divide both sides by 11 )

x = - 2

Substitute x = - 2 in (3) for corresponding value of y

y = (3 × - 2) + 11 = - 6 + 11 = 5

As a check

substitute x = - 2, y = 5 into (1) and (2) and if the left side equals the right side then these values are the solution.

(1) :  left side = (3 × 5) = 15

right side = 11 - (2 × - 2) = 11 + 4 = 15 ⇒ left = right

(2) : left side = (3 × - 2 ) = - 6

right side = 5 - 11 = - 6 ⇒ left = right

solution = (- 2, 5 )



5 0
3 years ago
A person bought some cosmetics from wholesale market at the rate of Rs 360 per dozen he sells it at Rs 80 a pair find the gain p
marusya05 [52]

Answer:

33.33%

Step-by-step explanation:

We need to calculate the <u>unit selling price and cost of each cosmetics.</u>

If a person bought some cosmetics from wholesale market at the rate of Rs 360 per dozen., then for 1 cosmetics, we will say;

x = 1 cosmetic

since 360 = 12 cosmetic

cross multiply

12x = 360

x = 360/12

x = 30

Hence the unit cost price of the cosmetics will be Rs. 30

Similarly, if he sells it at Rs 80 a pair, then he sold one cosmetic at 80/2 = Rs. 40 (a pair is 2 cosmetics)

Selling price per unit = Rs. 40

Cost price per unit = Rs. 30

percent gain = SP-CP/CP * 100%

percent gain = 40-30/30 * 100

percent gain = 10/30 * 100

percent gain = 100/3

percent gain = 33.33%

Hence the percentage gain is 33.33%

5 0
3 years ago
West of Checkpoint A, which is at (0,5), are two hurdles that Helena needs to jump over. Hurdle 1 is 4 units west of Checkpoint
jeka94

Answer:

Coordinate of Checkpoint B is (-9,5)

Step-by-step explanation:

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3 years ago
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