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3 years ago

Describe a way to make the arithmetic problem 45% x 680 mentally

Mathematics

1 answer:

lord [1]3 years ago

5 0

Answer:

306.

Step-by-step explanation:

Firstly, we are aware 100% of 680 is obviously 680,

Next, we know half of a 100% is 50% therefore half of 680 is 340.

Then, we know 45% is 5% less than 50%

To find 5% of a number mentally, divide it by 10 as 100÷5=20

680÷20=34

Lastly 50% subtracted by 5%: 340-34=306.

Now we know, 45% of 680 is 306.

<em>Hope this helps.</em>

<em>Hope this helps.Please mark BRAINLIEST.</em>

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vichka [17]

Answer:

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0.9135 - 0.87 = 0.0435

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True statement, so correct

c) 21m - 0.87 = m

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3 years ago

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PLEASE HELP AND SHOW WORK IF YOU CAN

Murljashka [212]

Answer:

c) XY > RS

= true

Step-by-step explanation:

Firstly know the meaning of each sign given

> means <u>is greater than</u>

= means <u>is equal to</u>

a)XZ > ST

XZ = 8

ST = 11 - greater

= false

b) XY = RS

Due to the angles presented, we conclude that the greater the angle, the longer the unmeasured line.

XY is longer than RS

= false

c) XY > RS

= true

d) RS > XY

RS is shorter than XY hence not greater.

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3 years ago

The local parts shop buys a machine that cost $500,000. Its value depreciates exponentially each year by 10% what is the machine

Irina18 [472]

Answer:

Step-by-step explanation:

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3 years ago

Solve for x and y: <br> Thanks for the help!

sweet-ann [11.9K]

Answer:

x = 2

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Step-by-step explanation:

As the triangle is split with a line that is parallel to the base:

$\implies x:6=6:18$

$\implies \dfrac{x}{6}=\dfrac{6}{18}$

$\implies x=\dfrac{6\cdot 6}{18}$

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7 0

2 years ago

Read 2 more answers

A parabola with its vertex at (24,10) and its axis of symmetry parallel to the y-axis passes through point (4,290). Write an equ

andrew-mc [135]

Answer:

Not executable

Step-by-step explanation:

f(x) = a(x - h)² + k - vertex form of the equation of the parabola with vertex (h, k)

so the equation of parabola with the vertex (24, 10) is :

f(x) = a(x - 24)² + 10

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That means you write something wrong in your question.

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2 years ago