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3 years ago

What is an equation for 7 more than a number is 10?

Mathematics

2 answers:

eimsori [14]3 years ago

5 0

Answer: I don't understand the problem.....................

cupoosta [38]3 years ago

4 0

Answer:

So, equation for 7 more than a number is 10 is $x+7=10$

Step-by-step explanation:

We need to write equation for 7 more than a number is 10.

For writing the equation, we first consider a number. Let the number be x

7 More than a number in mathematical form is translated as : $x+7$

So, equation for 7 more than a number is 10 is $x+7=10$

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Step-by-step explanation:

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3 years ago

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1 year ago

-2.1b +5.3= b -- 3.1b + 5.3<br><br> does is have one solution or infinitely many solutions ? Why ?

pychu [463]

Answer: infinitely many solutions.

Step-by-step explanation:

Ok, our equation is:

-2.1*b + 5.3 = b - 3.1*b + 5.3

now, simplifyng the right side, we have:

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Then our initial expression is:

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3 years ago

The coffee Lily likes is composed of 97.3% water and 2.7% cocoa. The coffee John likes is composed of 96% water and 4% cocoa. Ho

mestny [16]

30 ounces of the coffee John likes consists of

$0.96\cdot30=28.8$ ounces of water
$0.04\cdot30=1.2$ ounces of cocoa

To this mixture we're adding $x$ ounces of water, so that the new mix has a total volume of $30+x$ ounces and matches the composition of the coffee Lily likes. This means it would consist of

$0.973\cdot(30+x)=28.8+x$ ounces of water
$0.027\cdot(30+x)=1.2$ ounces of cocoa (same amount of cocoa as before because pure water is being added)

Solve for $x$ :

$0.973(30+x)=28.8+x\implies29.12+0.973x=28.8+x$

$\implies0.39=0.027x$

$\implies x\approx14.4$

###

Just to confirm: the new mixture consists of

$28.8+14.4=43.2$ ounces of water
$1.2+0=1.2$ ounces of cocoa

giving a total volume of $43.2+1.2=44.4$ ounces of coffee, and $\dfrac{43.2}{44.4}\approx0.973$ , as required.

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3 years ago

What is (2x+1) (3x+2)?

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers