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3 years ago

Tiffany earned a 90% on her math test. There were 50 questions on the test. How many questions did Tiffany answer correctly?

Mathematics

1 answer:

stellarik [79]3 years ago

3 0

45/50
45 divided by 50 = 0.9
90%

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Calculate the simple interest on $4,000,000 at 5% per annum for 2 years.

Dmitry_Shevchenko [17]

Answer:

400,000

Step-by-step explanation:

In total, you would be paying 400,000 for 2 years for the interest.

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2 years ago

I don’t know how to solve this, please help !

antiseptic1488 [7]

The trick here is realizing that both angles equal each other. There's a rule for this, but generally you can tell just by looking.

So what we can do is set these two equations equal each other, solve for x, and then plug x into angle B's original equation.

8x - 10 = 3x + 90

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x = 20

now we plug that x into angle B

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3 years ago

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A satellite is composed of 30 modular units, each of which is equipped with a set of sensors, some of which have been upgraded.

Marta_Voda [28]

Answer:

$\dfrac{1}{7}$

is the fraction of sensors upgraded per unit.

Step-by-step explanation:

We are given the following in the question:

Let x be the number of upgraded sensors in one unit and y be the number of non-upgraded sensors in one unit.

Number of modular units = 30

Since some part of unit is upgraded and some are non-upgraded, then, we can write the equation:

$x + y = 1$

Number of non-upgraded sensors =

$\dfrac{1}{5}\times \text{Total number of upgraded sensors on the entire satellite}$

Thus, we can write the equation:

$y = \dfrac{30x}{5}\\\\y = 6x\\1-x = 6x\\\\x = \dfrac{1}{7}$

Fraction of sensors upgraded per unit =

$\dfrac{1}{7}$

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Vedmedyk [2.9K]

P = 71/2 - 34/5
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3 years ago

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