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4 years ago

6 and 7? Geometry homework

Mathematics

1 answer:

Rashid [163]4 years ago

4 0

Answer:

Step-by-step explanation:

6) triangle ABC is similar to triangle DEC. It means that

AB/DE = BC/EC = AC/DC

Therefore,

6/21 = 10/y

Cross multiplying, it becomes

6y = 210

y = 210/6

y = 35

Also

6/21 = x/28

Cross multiplying, it becomes

6 × 28 = 21x

21x = 168

x = 168/21

x = 8

7) triangle JKL is similar to triangle NMP. It means that

JK/NM = KL/MP = JL/NP

Therefore,

49/14 = (9x + 1)/(x + 5)

Cross multiplying, it becomes

49(x + 5) = 14(9x + 1)

49x + 245 = 126x + 14

126x - 49x = 245 - 14

77x = 231

x = 231/77

x = 3

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Find the slope of this line. *

Elden [556K]

Answer:

Step-by-step explanation:

Slope = y2 - y1 / x2 - x1 so, (0 - (-2)) / (1 - (-1)) == 2/2 = 1

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3 years ago

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1/a^2-3a+2 + 1/a^2-5a+6 + 2/a^2-8a+15

Inessa [10]

Answer:

$\frac{4+16a^3+23a^3}{a^2}$

Step-by-step explanation:

Given

$1/a^2-3a+2 + 1/a^2-5a+6 + 2/a^2-8a+15$

Required

Simplify

$1/a^2-3a+2 + 1/a^2-5a+6 + 2/a^2-8a+15$

Collect Like Terms

$1/a^2 + 1/a^2 + 2/a^2-3a-5a-8a+2+6+15$

$1/a^2 + 1/a^2 + 2/a^2-16a+23$

Add Fractions:

$\frac{1+1+2}{a^2} + 16a + 23$

$\frac{4}{a^2} + 16a + 23$

This can be further expressed as:

$\frac{4+16a^3+23a^3}{a^2}$

4 0

3 years ago

HELP NOW PLEASE! What is the volume of a cube with length 8 feet? V=lwh _ft³

Igoryamba

the volume of the cube is: 512 cubic feet

Step-by-step explanation:

Given

Length = l = 8 feet

The formula for the volume of a cube is given by:

$V = l * w * h$

In case of a cube, the length, width and height are equal so the volume will be:

$V = l^3$

Putting l = 8

$V = (8)^3\\V = 8*8*8\\V = 512\ ft^3$

Hence,

the volume of the cube is: 512 cubic feet

Keywords: Volume, cube

Learn more about volume at:

#LearnwithBrainly

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4 years ago

3) Does the pair of ratios form a proportion? * yes no please ill give brainliest⊂-:

Komok [63]

Yes it does
Explanation

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3 years ago

Angad, Caroline and Sarah share some sweets in the ratio 4:2:1. Angad gets 20 sweets. How many sweets are there altogether?

sattari [20]

Answer:

35 sweets altogether

Step-by-step explanation:

20÷4=5

5*2=10

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3 years ago