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2 years ago

I need help on my homework! i've tried a couple of times on these 3 but im confused thanks

Mathematics

2 answers:

Yakvenalex [24]2 years ago

6 0

Answer:

Step-by-step explanation:

hope it helps brainliest pls

statuscvo [17]2 years ago

4 0

15/6=2.5 which is the scale factor since they are similar triangles. We divide each side of the large triangle by 2.5 to get the sides for the small triangle since they are similar. 20/2.5=8cm
25/2.5=10cm

For the second problem, you put 15/6 and set in equal to x/8 when you cross multiply you get 6x=120 then you divide x=20

For the last problem, you divide 43,75 by 5 then multiply it by 400 to get the kiloliters which equals 3,500.

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For the vectors u and v with magnitudes u = 88 and v = 99, find the angle θ between u and v which makes u and v = 77.

WARRIOR [948]

Answer:

Step-by-step explanation:

Using the vector formula $u.v = |u||v|cos\theta$

|u| = magnitude of vector u

|v| = magnitude of vector v

u.v is the dot product of vector u and v

Given |u| = 88, |v| = 99 and u.v = 77, to get $\theta$ we will substitute the given values into the equation above;

$77 = 88*99cos\theta\\cos\theta = \frac{77}{88*99} \\cos\theta = \frac{77}{8712} \\cos\theta = 0.008838\\\theta = cos^{-1} 0.008838\\\theta = 89.5^{0}$

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2 years ago

Hey guys what this answer step-by-step step<br> 2(7x+5)=122

prisoha [69]

The answer to your question is x=8

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2 years ago

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A classroom had 8 rows of desks with 6 desks in each row. Four desks were removed from the room. How many desks were left?

Oduvanchick [21]

Answer: 44 desks.

First of all, you need to find how many desks there are in total. To find it, you need to multiply 8 with 6.

8 x 6 = 48

Next, it says that four desks were removed. All you need to do is subtract 4 from 48.

48 - 4 = 44.

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2 years ago

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alina1380 [7]

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Subscribe to my animations Y0UTUBE channel! Channel name: Let Me Explain Studios. Have a nice day!

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2 years ago

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Harrizon [31]

Answer:

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Step-by-step explanation

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