3 years ago

Help thanks!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

harkovskaia [24]3 years ago

6 0

The answer is A because that information they gave to you

kifflom [539]3 years ago

3 0

Answer: its given for reasons

Step-by-step explanation: a or given

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Help now ____________[_

marta [7]

10 x 5 = 50
4 x 7 = 28
3 x 4 = 12 12/2=6

50+28+6= 84 square inches

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3 years ago

The value of y varies directly with x, and y = 1 when x = 3. Find y when x = 18. A. 9 B. 3 C. 6 D. −2

vaieri [72.5K]

<span>C. 6 is your answer

1/3 = y/18
3y = 18
y = 6</span>

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3 years ago

What's 5 - the square root of x + 10 = the square root of 7 - x

Tcecarenko [31]

$\bf 5-\sqrt{x+10}=\sqrt{7-x}\impliedby \textit{squaring both sides}
\\\\\\
(5-\sqrt{x+10})^2=(\sqrt{7-x})^2
\\\\\\
(5^2)-10\sqrt{x+10}+(x+10)=7-x
\\\\\\
35-10\sqrt{x+10}+x=7-x\implies 28-10\sqrt{x+10}+2x=0
\\\\\\
2x+28=10\sqrt{x+10}\implies x+14=5\sqrt{x+10}\impliedby 
\begin{array}{llll}
squaring\ both\\
sides\ again
\end{array}
\\\\\\
$

$\bf (x^2)+28x+(14^2)=5^2(x+10)\implies x^2+28x+196=25x+250
\\\\\\
\begin{array}{lcclll}
x^2&+3x&-54&=0\\
&\uparrow &\uparrow \\
&-6+9&-6\cdot 9
\end{array} \implies (x+9)(x-6)=0\implies 
\begin{cases}
x+9=0\\
\boxed{x=-9}\\
-----\\
x-6=0\\
\boxed{x=6}
\end{cases}$

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3 years ago

Alison has $4 less than twice the amount Ben has. Which expression represents Alison’s amount if Ben has m dollars?

fredd [130]

Answer:

2m-4

Step-by-step explanation:

because she has double his amount (2*m) but $4 less therefore 2m-4

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3 years ago

Read 2 more answers

A farmer sells 6.5 kilograms of pears and apples at the farmer's market. 4 5 of this weight is pears, and the rest is apples. Ho

jeka94

Answer:

Step-by-step explanation:

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3 years ago