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liubo4ka [24]
3 years ago
12

Determine which statement is a true proportion. 10/9=11/10 12/42=10/35 48/56=40/48 1/2=3/4

Mathematics
1 answer:
DaniilM [7]3 years ago
3 0
Hello!
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I think that 12/42=10/35 is a true proportion. 10/9=11/10 are almost a true proportion, but 10/9 is 1.1111111111..., and 11/10 is 1.1. 48/56=40/48 and 1/2=3/4 are different numbers when in decimal form.
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I hope this helps and have a great day! :)
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Fifteen us added to product of a number and 6. the result is 9
solong [7]

Answer:

Let y be our number:

6y+15=9

Step-by-step explanation:

Since it is the product, you have to multiply:

6y

Next, you will have to add 15, +15

6y+15

This expression will equal to 9

6y+15=9

Hope This Was Helpful!

8 0
3 years ago
HELP MEH!!! A cylinder has a height of 1.2 cm and the following base.
hram777 [196]
Triple the dimensions, multiply, and you get D

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Find the value of x.<br> xo<br> (x-20)<br> (2x + 10)<br> (x + 40)
kykrilka [37]

Answer:

66

Step-by-step explanation:

We can write the following equation to solve

360 = x + (2x + 10) + (x - 20) + (x  + 40)

Reduce

360 = 5x + 30

5x = 330

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7 0
2 years ago
Solve for y 16y^2-25=0
Pepsi [2]

Answer:

\large\boxed{x=-\dfrac{5}{4}\ \vee\ x=\dfrac{5}{4}}

Step-by-step explanation:

16y^2-25=0\\\\METHOD\ 1:\\\text{use}\ a^2-b^2=(a-b)(a+b)\\\\16=4^2\ \text{and}\ 25=5^2\ \text{therefore we have}\\\\4^2y^2-5^2=0\\\\(4y)^2-5^2=0\\\\(4y-5)(4y+5)+0\iff4y-5=0\ \vee\ 4y+5=0\\\\4y-5=0\qquad\text{add 5 to both sides}\\4y=5\qquad\text{divide both sides by 4}\\\boxed{y=\dfrac{5}{4}}\\\\4y+5=0\qquad\text{subtract 5 from both sides}\\4y=-5\qquad\text{divide both sides by 4}\\\boxed{x=-\dfrac{5}{4}}

METHOD\ 2:\\\\16y^2-25=0\qquad\text{add 25 to both sides}\\\\16y^2=25\qquad\text{divide both sides by 16}\\\\y^2=\dfrac{25}{16}\to y=\pm\sqrt{\dfrac{25}{26}}\\\\y=-\dfrac{\sqrt{25}}{\sqrt{16}}\ \vee\ x=\dfrac{\sqrt{25}}{\sqrt{16}}\\\\\boxed{y=-\dfrac{5}{4}\ \vee\ x=\dfrac{5}{4}}

7 0
3 years ago
Read 2 more answers
Sajia has 30 Books in her library. she sold 9 books at the thrift store on Saturday. Write and solve and inequality to determine
ELEN [110]

Sajia can sell 21 books she can sell if she comes back on sunday and the required inequality is 9 + x \leq 30

<em><u>Solution:</u></em>

Given that Sajia has 30 Books in her library

She sold 9 books at the thrift store on Saturday

To find: We have to write and solve an inequality to determine number of more books she can sell if she comes back on sunday

Let "x" be the number of more books she can sell if she comes back on sunday

<em><u>We can write a inequality as:</u></em>

\text{ books already sold } + \text{ number of books remaining } \leq \text{ total number of books she has }

9 + x \leq 30

Now moving 9 from L.H.S to R.H.S we get,

x \leq 30 - 9

On solving 30 - 9 = 21,

x \leq 21

So Sajia can sell 21 books she can sell if she comes back on sunday

6 0
2 years ago
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