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3 years ago

2/3x-5=21 (2/3 is a fraction_

2 answers:

8 0

You will distribute -5 to 21, making it positive
2/3x=26
you would then distribute 2/3 to 26 leaving us with
x=26/1(3/2)
X=13(3)
x=39

pochemuha3 years ago

5 0

2/3 x - 5 = 21
2/3 x = 21 + 5 = 26
x = 26 / 2/3 = 26 * 3 /2 = 78/2 = 39

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The ratio of marbles to stones is 5 to 7 if there are 35 marbles how many stones is there?

icang [17]

5 : 7
Marbles : Stones

35/5 = 7
So stones
= 7 * 7
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=35 : 49

3 0

3 years ago

Read 2 more answers

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Stels [109]

Answer:

13. c,

14. a.

Step-by-step explanation:

13. The length of a side PQ with coordinates of

P as (x,y) and Q as (w,z)

is: $\sqrt{(x-w)^{2} +(y-z)^{2} }$

so, the length of the side AB =

$\sqrt{(5-5)^{2}+(-2+7)^{2} } =\sqrt{0^{2}+5^{2} } =5$

the length of side BC =

$\sqrt{(5-1)^{2}+(-7+2)^{2} } =\sqrt{(4)^{2}+(-5)^{2} } =\sqrt{4^{2}+5^{2} }$

the length of side AC=

$\sqrt{(5-1)^{2} +(-2+2)^{2} } =\sqrt{4^{2} } =4$

now, the easiest one will be when the vertices are on the coordinate axes.

so, option c will be the most appropriate one.

14. If u see the figure clearly, the lines l and FH are parallel.

the parallel postulate, i.e, the alternate interior angles will always be congruent.

here, the alternate interior angles are angle1 and angle4.

therefore to prove this step, he used parallel postulate as a reason.

so, the correct option is "a"

7 0

3 years ago

Which shape has four congruent sides and two sets of parallel sides?

Dovator [93]

It’s a Parallelogram

6 0

2 years ago

What is the area of triangle DEF?

FrozenT [24]

Answer:

$A=2\sqrt{14}\ units^2$

Step-by-step explanation:

we know that

Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.

$A=\sqrt{s(s-a)(s-b)(s-c)}$

where

a, b and c are the length sides of triangle

s is the semi-perimeter of triangle

we have

$a=5\ units,b=6\ units,c=3\ units$

<em>Find the semi-perimeter s </em>

s= $\frac{5+6+3}{2}=7\ units$

Find the area of triangle

$A=\sqrt{7(7-5)(7-6)(7-3)}$

$A=\sqrt{7(2)(1)(4)}$

$A=\sqrt{56}\ units^2$

simplify

$A=2\sqrt{14}\ units^2$

3 0

2 years ago

HELP!

olchik [2.2K]

C.35cm
Should be the right answer

5 0

3 years ago