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3 years ago

what is the equation to seven less than the product of twice a number is greater than 5 more than the same number

2 answers:

7 0

seven less than (-7) than the product of twice a number (2x) is greater than (>) five more than (+5) the same number (x)

2x-7>x+5
treat the > sign as an equals for now
2x-7=x+5
subtract x from both sides
x-7=5
add 7 to both sides
x=12
put the > sign back in
x>12

amid [387]3 years ago

4 0

Let the number be x.

Seven less than the product of twice a number : 2x - 7.
Greater than >
5 more than the same number : x + 5

The equation is: 2x - 7 > x + 5.

That's the answer. But let us just go ahead and solve it.

2x - 7 > x + 5.
2x - x > 5 + 7
x > 12.

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Sarafina and Katie have between $105 and $420 dollars to spend on jewelry for Christmas presents for their friends. If they buy

algol13

Answer:

Step-by-step explanation:

105+420=525 (Total Money)

7x3.25=22.75 (Cost of all bracelets)

8x11.74=93.92 (Cost of all necklaces)

93.92+22.75=116.67 (Cost of all Christmas presents)

525-116.67=408.33 (Total money - Cost of all Christmas presents)

408.33/6.15=66.39... (Amount of necklaces)

since in real life you can only buy a whole number of things, you would round down 66.39 to 66. I hope this helped!

5 0

3 years ago

I need help with #39-42, please explain.

shusha [124]

For question 39 & 40, we need to use the below equation to complete the sentence

$l=m\sqrt{n}$

Question 39:

When ' n ' increase, the $\sqrt{n}$ will also increase and that multiplied with constant ' m ', the l will also increase.

Solution for question 39:

As $n$ increases and $m$ stays constant , $l$ increases

-------

Question 40:

Solving the equation for m, we get

$l = m\sqrt{n} \\ \\ m=\frac{l}{\sqrt{n}}$

When ' l ' increases, the numerator increase, the denominator stays constant because 'n' stays constant, for this condition, the fraction increases.

Solution for question 40:

As $l$ increase and $n$ stays constant, $m$ increases

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For question 41 & 42, we need to use the below equation to complete the sentence

$r=s^2/t^2$

Question 41:

When $s$ is triped, the equation will be...

$r=(3s)^2/t^2=\frac{3^{2}s^{2}}{t^2} =9s^2/t^2$

Solution for question 41:

If $s$ is tripled and $t$ stays constant, $r$ is multiplied by 9

--------

Question 42:

When t is doubled, the equation will be...

$r=s^2/(2t)^2=\frac{s^2}{2^2 \cdot t^2}=\frac{s^2}{4t^2}\\ \\ r=0.25s^2/t^2 \; \; (or) \; \; \frac{1}{4} \cdot \frac{s^2}{t^2}$

Solution for 42:

If $t$ doubled and $s$ stays constant, $r$ is multiplied by 1/4 or 0.25

3 0

3 years ago

Use the arc length formula and the given information to find r.. s = 16 cm, θ = 48°; r = ?

saveliy_v [14]

Answer:

The value for r is 19.1 cm

Step-by-step explanation:

We have been given that s = 16 cm, θ = 48° and we have to find the radius r.

We know the relation

$\theta=\frac{s}{r}\\\\r=\frac{s}{\theta},\text{ where }\theta \text{ is in radian}$

Hence, first of all convert the angle in radian

θ = 48°= 0.837758 radian

Therefore, we have

$r=\frac{16}{0.837758}\\\\r=19.1\text{ cm}$

8 0

3 years ago

Read 2 more answers

.7 pls :P need this so I don’t fail math

Masteriza [31]

Answer:

Step-by-step explanation:

distribute 1/2 into 2x and 4, if both sides match then its infinitely many solutions !

7 0

3 years ago

If you wanted to find the difference of 6/25-4/5 what common denominator should you choose and why?

sveticcg [70]

25 because it s a less common denominaor

3 0

3 years ago