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3 years ago

5

Which value of x makes the equation below true? 2/5x + 10 = 30

1 answer:

Westkost [7]3 years ago

6 0

Answer:

x=50

Step-by-step explanation:

2/5x50 + 10 = 30

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A rectangular plot of land has an area of 9/10 square mile. The length is 3/2 miles. What is the width?

jek_recluse [69]

Answer:

$\frac{3}{5}$

Step-by-step explanation:

The question is simple. All we have to do is divide $\frac{9}{10}$ by $\frac{3}{2}$ . The answer to that is $\frac{3}{5}$ .

8 0

3 years ago

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100 POINTS HELP ASAP Linear Combination

notka56 [123]

Answer:

1) $x=\dfrac12$

2) $n = -3 \ \ \textsf{and} \ \ m = -4$

3) see below

4) A: 0 = 1

Step-by-step explanation:

<u>Question 1</u>

$15-0.5(4x-2)+4x=17$

$\implies 15-2x+1+4x=17$

$\implies 2x+16=17$

$\implies 2x=1$

$\implies x=\dfrac12$

<u>Question 2</u>

$\textsf{rearrange} \ n=m+1 :$

$\implies -m=-n+1$

$\textsf{add equations} \ -m=-n+1 \ \textsf{and} \ m=2n+2:\\$

$\implies0=n+3$

$\implies n=-3$

$\textsf{substitute} \ \ n=-3 \ \ \textsf{into} \ \ m=n-1:$

$\implies m=-3-1$

$\implies m=-4$

<u>Question 3</u>

subtract the second equation from the first

divide both sides by -4

substitute found value for y into first equation

solve for x

<u>Question 4</u>

$3j=k$

$k=3j+1$

$\textsf{rearrange} \ 3j=k :$

$\implies -k=-3j$

$\textsf{add equations}\ -k=-3j \ \ \textsf{and}\ \ k=3j+1:$

$\implies 0=1$

Solution = A

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2 years ago

The measure of angle n is 42º. what is the measure of angle k? parallelogram k l m n where k n is parallel to l m and k l is par

Kipish [7]

Becouse k and n are 'neighbours' so their sum are 180
so k=180-42=138

7 0

3 years ago

ZE and ZF are vertical angles with mZE = 8x + 8 and mZF = 2x +38.<br> What is the value of x?

Dovator [93]

Answer:

Since ZE and ZF are vertical angles, they are congruent.

8x+8 = 2x+38

8 = 2x-8x+38

8 = -6x+38

8-38 = -6x

-30 = -6x

x = -30/-6

x = 5

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3 years ago

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Need help with math probelm if do 5 stars

DerKrebs [107]

D. 62 because if we separate the shape into two then one will be 5*4 and the other will be 7*6. Adding them up will equal the whole shape.

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3 years ago