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mash [69]
3 years ago
13

Elijah wants to fence in a rectangular play area in his backyard for his new puppies. He wants the length of

Mathematics
1 answer:
makkiz [27]3 years ago
8 0

48  \div 4 = 12

12 - 4 = 8

12 \times 2 = 24

8 \times 2 = 16

24 + 16 = 40

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Given that e= 2i – 5j + 9k and f= 8i + 15j + k, find 3f – 2e.
ipn [44]

Plug in "8i + 15j + k" for "f", and "2i – 5j + 9k" for "e"

3(8i + 15j + k) - 2(2i – 5j + 9k)

Distribute 3 to (8i + 15j + k) & - 2 to (2i – 5j + 9k)

3(8i + 15j + k) = 24i + 45j + 3k

-2(2i - 5j + 9k) = -4i + 10j - 18k

-------------------------------------------------------------------------------------------------------------------

Simplify. Combine like terms

24i - 4i + 45j + 10j + 3k - 18k

(24i - 4i) + (45j + 10j) + (3k - 18k)

20i + 55j - 15k is your answer, or (C)

-------------------------------------------------------------------------------------------------------------------

hope this helps

5 0
2 years ago
Read 2 more answers
What is the slope from the coordinate points (2,6) (1,9)
Hunter-Best [27]

Answer:

m=-3

General Formulas and Concepts:

<u>Pre-Alg</u>

  • Order of Operations: BPEMDAS

<u>Alg I</u>

  • Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}

Step-by-step explanation:

<u>Step 1: Define</u>

Point (2, 6)

Point (1, 9)

<u>Step 2: Find slope </u><em><u>m</u></em>

  1. Substitute:                    m=\frac{9-6}{1-2}
  2. Subtract:                       m=\frac{3}{-1}
  3. Divide:                           m=-3
8 0
2 years ago
Read 2 more answers
Guys please help! In triangle CDE, the measure of angle C is 90 degrees, side CD is 15 and DE is 3 more than CE. Find the length
AURORKA [14]
You can calculate it using the law of cosines: c^2=a^2+b^2-2*a*b*cos(C)

your triangle is
CD=15=a
CE=?=b
DE=CE+3=b+3=c
and C=90°

-> insert those values, with c substituted with b+3 to remove c

c^2=a^2+b^2-2*a*b*cos(C)
(b+3)^2=15^2+b^2-2*15*b*cos(90)
cos(90)=0->
(b+3)^2=15^2+b^2
b^2+2*3*b+3^2=225+b^2
6b+9=225
6b=216
b=36=CE

DE=CE+3=36+3=39
4 0
3 years ago
Which of the following consists of equivalent fractions
NeTakaya
The first one is the only one that shows equivalent fractions

If correct brainliest please

Thank you and Your welcome

:)
3 0
3 years ago
Read 2 more answers
Tuition at Greenery Grove College costs $9,100 this year. Elise's parents have agreed to pay
kirill115 [55]

Answer:

2275

Step-by-step explanation:

9100/4 = 2275

this is why you don't go to college, you get boatloads of debt

8 0
3 years ago
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