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2 years ago

Find the difference: 7 7/8 - 3 1/4=?

Mathematics

2 answers:

Oduvanchick [21]2 years ago

4 0

They are both improper fractions so u could subtract normal

guapka [62]2 years ago

3 0

37/8 or 4 5/8

To make it easier, make both numbers into an improper fraction then subtract normally.

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Matthew has a 150 page book he has read one third of it how many pages has he read so far

posledela

You take 150/3. The answer is 50.

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3 years ago

Please help! Thanks in advance.

alukav5142 [94]

In this problem, we need to plug in the given x values for $f(x)=0$ and find a and b.

When we plug in 1, we get: $2 \times {1}^{4} - 5 \times {1}^{3} - 14 \times {1}^{2} + a \times 1 + b = 0$

Simplify:
$2 - 5 - 14 + a + b = 0$
$- 17 + a + b = 0$
$a + b = 17$

We got our first statement about the values of the variables. If we find one more we can find those 2 variables.

We have another given root: 4.

Plug it in:
$2 \times {4}^{4} - 5 \times {4}^{3} - 14 \times {4}^{2} + a \times 4 + b = 0$
$512 - 320 - 224 + 4a + b = 0$
$- 32 + 4a + b = 0$
$4a + b = 32$

Now we have our second one. We can combine them:
$a + b = 17 \\ 4a + b = 32$

I use elimination method which is easier here.

Multiply the top equation by -1: $- a - b = - 17 \\ 4a + b = 32$

Add them up:
$3a = 15$

Simplify:
$a = 5$

Now we have a, we can plug in one of those equations to find b:
$5 + b = 17$
$b = 17 - 5$
$b = 12$

So, the answers are $a=5$ and $b=12$ .

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3 years ago

What are the three choices equivalent to 27^4/3

12345 [234]

the answers are B,D and F

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2 years ago

Bobby hopes that he will someday be more than 70 inches tall. he is currently 61 inches tall. how many more inches,

Dominik [7]

Bobby should grow an amount greater than 70-61 = 9 inches to become taller than 70 inches. Therefore, the correct answer is that Bobby must grow an amount of x> 9 inches to be taller than 70 inches.

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3 years ago

What is the measure of ∠2 if c∥d ?

Ivahew [28]

Since both C & D are parallel, angle 2 is a corresponding angle to the angle of 108 degrees, so angle 2 is also 108 degrees

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3 years ago