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Alik [6]
3 years ago
7

7) BRAINLIEST + 15+ POINTS :D

Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
7 0

Answer:

C. 34%

Step-by-step explanation:

I already answered this, but here goes.

Hello there!

Divide the solutions into 100s, and find their percentages.

60/100=0.6*40=24

40/100=0.4*25=24+10

24+10=34 %

;)

Colt1911 [192]3 years ago
7 0

Answer:

34%

Step-by-step explanation:

To find the concentration of the new solution, take the percent time the amount of each of the solutions

40 ml* 25% + 60 ml * 40% = 100 ml* percent

40 * .25 + 60 *.40 = 100 * P

10 + 24 = 100 P

34 = 100 P

Divide each side by 100

34/100 = P

.34 = P

Changing to a percent

34% = P

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It is 20 feet high I believe. If it is wrong I am so sorry. 
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3 years ago
The ratio of the perimeters of two similar triangles is 3:7. Find the ration of the areas! Please help, I am really not sure. An
PIT_PIT [208]
I don't have a visual I can provide, but the ratio of the areas is the square of the ratio of the perimeters of a 2D figure.

Intuitively, you can imagine that the triangle is simply being "scaled up" by a factor of 7/3, so the base scales up to 7/3 its original length and the height becomes 7/3 its original height.

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5 0
3 years ago
What's the answer to this
shutvik [7]

you would first have to multiply 20% by 3.24 and then youll get 0.648 then you subtract 3.24 by 0.648 and get 2.60. Then multiply 20% by 3.99 and get 0.798 then subtract 3.99 by 0.798 and get 3.19 then add 2.60 with 3.19 to get 5.79. 5.79 is how much she spent with 20% off

3 0
3 years ago
Please help me i will give brainlist to the correct answer​
mestny [16]

Answer:

<ABC = 27

< BAC = 126

Step-by-step explanation:

<C = <B since it is an isosceles triangle.  We know this since AC - AB

<C = 27 so <ABC = 27

The sum of the angles of a triangle = 180

A + B+ C = 180

A + 27+27 = 180

A + 54 =180

A = 180-54

A =126

< BAC = 126

5 0
3 years ago
Can help me complete this problem please :c
motikmotik

Answer:

A = \dfrac{7}{2}\pi~cm^2

Step-by-step explanation:

There is a formula for the area of a sector given the radius and the angle measure.

A = \dfrac{n}{360^\circ}\pi r

n = angle measure

r = radius

A = \dfrac{140^\circ}{360^\circ}\pi \times (3~cm)^2

A = \dfrac{14}{36}\pi \times 9~cm^2

A = \dfrac{7}{18}\pi \times 9~cm^2

A = \dfrac{7}{2}\pi~cm^2

3 0
3 years ago
Read 2 more answers
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