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3 years ago

Write the linear equation that gives the rule for this table.

Mathematics

1 answer:

stiks02 [169]3 years ago

8 0

Answer:6-(3=5)

Step-by-step explanation:beacause you add +2

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Alex got 21 out of 26 on a maths test and Miall got 23 out of 30 for a science test. who got the highest percentage?

Marizza181 [45]

A 21 out of 26 is equal to about an 80%
A 23 out of 30 is equal to about 73%
So Alex scored a higher grade on the science test

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2 years ago

7+x+7x equivalent expressions

bearhunter [10]

8x+7, 7x+x+7, 7+x(1+7)

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3 years ago

The sum of squares of two consecutive odd numbers is 514 find the numbers

amid [387]

Correct Question : The sum of squares of two consecutive positive odd numbers is 514. Find the numbers.

$\rule{130}1$

Solution :

Let the two consecutive positive odd numbers be x and (x + 2)

$\rule{130}1$

☯ $\underline{\boldsymbol{According\: to \:the\: Question\:now :}}$

$:\implies\sf x^2 + (x + 2)^{2} = 514 \\\\\\:\implies\sf x^2 + x^2 + 4x + 4 = 514\\\\\\:\implies\sf 2x^2 + 4x + 4 = 514 \\\\\\:\implies\sf 2x^2 + 4x = 514 - 4\\\\\\:\implies\sf 2x^2 + 4x = 510 \\\\\\:\implies\sf 2x^2 + 4x - 510 = 0\\\\\\:\implies\sf x^2 + 2x - 255 = 0 \:\:\:\:\:\Bigg\lgroup \bf{Dividing\:by\:2}\Bigg\rgroup\\\\\\:\implies\sf x^2 + 17x - 15x - 255 = 0\\\\\\:\implies\sf x(x + 17) - 15(x + 17) = 0\\\\\\:\implies\sf (x + 17) (x - 15)\\\\\\:\implies\sf x = - 17\:or\:x = 15\\\\\\:\implies\underline{\boxed {\sf x = 15}}\:\:\:\:\:\Bigg\lgroup \bf{Positive\:odd\: number}\Bigg\rgroup$

When,

$\bullet\: \textsf {x = } \textbf {15}$

$\bullet\: \sf x + 2 = 15 + 2 =\textbf{ 17}$

$\therefore\:\underline{\textsf{The required positive integer is \textbf{15 and 17}}}.$

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3 years ago

A phone company offers two monthly plans. Plan A costs

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For plan A it will only take five minutes to amount to $20.50

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3 years ago

Read 2 more answers

A money box contains only 10-cent and 20-cent coins. There are 34 coins with a total value of $5.40. How many coins of each

kow [346]

10x+20y=540
x+y=34
y=34-x

Plug in (34-x) for y:
10x+20(34-x)=540
10x+680-20x=540
-10x=-140
10x=140
x=14

There were 14 ten cent coins and 20 20 cent coins

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3 years ago