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3 years ago

Please help me please with this question please please help me with this question

Mathematics

2 answers:

labwork [276]3 years ago

8 0

Answer:

6 - 4 + (- 5) = -3

This probably won't answer your question though. ): This on is hard

katrin [286]3 years ago

4 0

Solve for x =-3 plug in the -3, -7(-3)=21

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Prove that<br> cos^4∆ - sin^4∆ = 2cos^2∆ - 1

GarryVolchara [31]

$\cos^{4} x-\sin^{4} x\\\\=(\cos^{2} x+\sin^{2} x)(\cos^{2} x-\sin^{2} x)\\\\=\cos^{2} x-\sin^{2} x\\\\=\cos^{2} x-(1-\cos^{2} x)\\\\=2\cos^{2} x-1$

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2 years ago

A triangle has two sides of length 2 and 18. What is the largest possible whole-number length for the third side?

Snezhnost [94]

Answer:

Step-by-step explanation:

Given 2 sides of a triangle then the third side x is

difference of 2 sides < x < sum of 2 sides , that is

18 - 2 < x < 18 + 2

16 < x < 20

Then the largest possible length of the third side is 19

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2 years ago

PLS PLS PLS PUT THIS ON THE NUMBER LINE FROM LEAST TO GREATEST !!!!!!! I WILL GIVE BRAINLIESST!

Digiron [165]

Answer:

Where's the number line?

Step-by-step explanation:

4 0

3 years ago

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What does x equal to? “?” = x Solve by using fractions and round to the nearest hundredth if necessary

Anna007 [38]

Answer:

3.5 inches

Step-by-step explanation:

We can rotate the figure to the left 90 degrees clockwise so that it becomes same orientation as the figure to the right.

Since they are similar figures, their corresponding sides are proportional.

The 4 inch side of left figure corresponds to 16 in side of right side figure.

The "?" inch side of left figure corresponds to 14 in side of right side figure.

We can replace "?" with "x" and setup two ratios and equate them:

$\frac{4}{16}=\frac{x}{14}$

Now, we can cross multiply and solve for x:

$\frac{4}{16}=\frac{x}{14}\\16x=4*14\\16x=56\\x=\frac{56}{16}\\x=3.5$

Hence,

the unknown side marked "?" is equal to 3.5 inches

6 0

3 years ago

Haley measured the distances between her house and two of her friends' houses. ellen's house is 1.41 miles away from haley's, an

Arada [10]

Answer: Ellen's house is farther away by 898 feet.

Step-by-step explanation:

Given: The distance between Haley's house and Ellen's house = 1.41 miles

We know that 1 mile = 5,280 feet

Then, $1.41\text{ miles}=1.41\times5,280\text{ feet}=7,444.8\text{ feet}$

The distance between Haley's house and Dirk's house = 6,547 feet

Clearly, 6,547<7,444.8

And $7444.8-6547= 897.8\approx898$

Therefore, Ellen's house is farther away by 898 feet.

3 0

3 years ago

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