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3 years ago

Do u need a common denominator if you have adding and dividing in fractions?

2 answers:

8 0

No you don't because you use the reciprocal and then multiply to divide the fractions, not a common denominator, you need that when there are different denominators and you are adding/subtracting

Rama09 [41]3 years ago

4 0

You only need a common denominator for adding and subtracting! <span />

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Write an algebraic expression for the verbal description. the distance a car travels in t hours at a rate of 50 miles per hour

aleksklad [387]

The correct answer is
d=50t
Where; d is the distance covered in miles
t is the time taken in hours

6 0

3 years ago

Tara is making dinner for 9 people. She mixes 1 1/4 kilograms of rice with 500grams of vegetables and 410 grams of meat. If all

kotegsom [21]

Answer:

240 grams

Step-by-step explanation:

Tara uses:

$1 \dfrac{1}{4}\ kg=1 \ kg\ 250 \ g=1250\ g$ of rice
500 g of vegatables
410 g of meat

In total, Tara uses

$1250+500+410=2160\ g$ of ingredients.

She is making dinner for 9 people, so the weight of each serving is

$2160:9=240\ g$

3 0

3 years ago

Which of the following represent the values of x, y, and z.

Paraphin [41]

Answer:

Part 1) $z=4\sqrt{3}\ units$

Part 2) $y=4\sqrt{2}\ units$

Part 3) $x=4\sqrt{6}\ units$

Step-by-step explanation:

see the attached figure with letters to better understand the problem

step 1

<em>Find the value of z</em>

In the right triangle DBC

$cos(C)=\frac{4}{z}$ ----> equation A

In the right triangle ABC

$cos(C)=\frac{z}{12}$ ----> equation B

equate equation A and equation B

$\frac{4}{z}=\frac{z}{12}$

$z^{2}=48$

$z=4\sqrt{3}\ units$

step 2

In the right triangle DBC

Applying the Pythagoras Theorem

$z^{2}=y^{2}+4^{2}$

we have

$z=4\sqrt{3}\ units$

substitute

$(4\sqrt{3})^{2}=y^{2}+4^{2}$

$48=y^{2}+16$

$y^{2}=48-16$

$y^{2}=32$

$y=4\sqrt{2}\ units$

step 3

Find the value of x

In the right triangle ABC

Applying the Pythagoras Theorem

$12^{2}=x^{2}+z^{2}$

we have

$z=4\sqrt{3}\ units$

substitute

$12^{2}=x^{2}+(4\sqrt{3})^{2}$

$144=x^{2}+48$

$x^{2}=144-48$

$x^{2}=96$

$x=4\sqrt{6}\ units$

6 0

3 years ago

a friend uses the distributive property to simplify 4(2b-5) and gets 8b - 5 as the result. describe and correct the error.

oksian1 [2.3K]

well it would be 8b - 20 because you have to multuply by 4 on 5 too not just 2b

3 0

3 years ago

Using the paths below assume that the distance from Selma to Decatur is 40.9km. How far is it from Selma to Alexander city?

oksian1 [2.3K]

Answer:

sorry po hindi ko po alam

8 0

3 years ago