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3 years ago

Combine like terms to create an equivalent expression 2/5m - 4/5 - 3/5m

Mathematics

1 answer:

AnnZ [28]3 years ago

3 0

Answer:

-1/5m-4/5

Step-by-step explanation:

2/5m-4/5-3/5m

2/5m-3/5m-4/5

-1/5m-4/5

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3 years ago

The square of a number is equal to 10 less than 7 times that number. What are the two possible solutions?

Stella [2.4K]

Answer:

x = 5, 2

Step-by-step explanation:

x^2 = 7x - 10

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Read 2 more answers

Find x in the given figures.

marin [14]

Answer:

$\large\boxed{X=\sqrt{12}\ in=2\sqrt3\ in}$

Step-by-step explanation:

ΔADC and ΔCBD are similar. Therefore the corresponding sides are in proportion:

$\dfrac{AD}{CD}=\dfrac{CD}{DB}$

We have

AD = 2, CD = X, DB = 6.

Substitute:

$\dfrac{2}{X}=\dfrac{X}{6}$ <em>cross multiply</em>

$X^2=(2)(6)\\\\X^2=12\to X+\sqrt{12}$

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3 years ago

A motorboat travels 448 kilometers in 8 hours going upstream and 440 kilometers in 5 hours going downstream. What is the rate of

liubo4ka [24]

9514 1404 393

Answer:

boat: 72 km/h
current: 16 km/h

Step-by-step explanation:

The speed difference between boat and current is the upstream rate:

(448 km)/(8 h) = 56 km/h

The sum of speeds of boat and current is the downstream rate:

(440 km)/(5 h) = 88 km/h

The rate of the boat is half the sum of these:

(56 +88)/2 = 72 . . . km/h

The rate of the current is half their difference:

(88 -56)/2 = 16 . . . km/h

The rate of the boat is 72 km/h; the rate of the current is 16 km/h.

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3 years ago