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Oksanka [162]
3 years ago
15

3 (7-9x)-5 (5x+1)=-8 (9x-4)

Mathematics
1 answer:
Whitepunk [10]3 years ago
5 0
Open the equation
21-27x-25x-5= -72x+32
collect like terms
21-5-27x-25x=-72x+32
16-52x=-72x+32
collect like terms
-52x+72x=32-16
-20x=16
divide both sides by -20
x= -16/20
divide into the lowest term
x= -4/5

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I don't understand raitos please help solve math problems
ollegr [7]
1st is to make the numbers into ratios. Basically taking the two numbers and putting them in the middle. I’ll do the 1st 15:36.
Next you put it into a fraction: 15/36
Put in the comments if you want me to do all or if you have any questions!
4 0
3 years ago
4 measurements = 10 points Can anyone help?
m_a_m_a [10]

FIG A : ANGLE OF BAC = 67.38 °

FIG B : LENGTH OF RT = 10.549 cm

FIG C: LENGTH OF AB =  5.282 cm

FIG D:  ANGLE OF ACB = 37.303°

Step-by-step explanation:

Fig A:

ABC angle = ( Opposite side) / (Hypotenuse)

                  Sin Ф = (12) / (13)

                   Ф = Sin⁻¹ ( 12/13)

                    Ф = 67.38 °

Fig B:

By the basic property of  trigonometry

Tan Ф = (Opposite side) / (Adjacent side)

Tan Ф = (14)/ X

X= 14 / (Tan 53° )

Length of RT = 10.549 cm

Fig C:

By the basic property of trigonometry

Sin Ф = (Opposite side) / (Hypotenuse)

Sin Ф = (X) / 12.5

X = 12.5 * Sin 25°

X=  5.282 cm

Fig D:

From the basic property of Trigonometry

Tan Ф = (Opposite side) / (Adjacent side)

Tan Ф = (8/10.5)

Ф = Tan⁻¹ ( 8/10.5)

  Ф = 37.303°

8 0
4 years ago
Carla bought 2 pounds of red beads three-quarter pounds of green beads and 10 ounces of string at the craft store how much do Ka
skad [1K]
<span><u>70 ounces</u> OR <u>4.375 pounds</u> OR <u>4 pounds and 6 ounces</u></span>
<span><em>[To get this answer, first make pounds into ounces. There are 16 ounces in a pound. Multiply 2 (pounds) and 16 (ounces in a pound) to get 32 ounces of red beads. Next, do the same to the 1 3/4 pounds of green beads: 1 3/4 (pounds) times 16 (ounces in a pound) make 28 ounces. Last add 32 (oz) + 28 (oz) + 10 (oz) together to get the total weight of her supplies: 70 oz OR 4.375 lbs OR 6 oz. It's up to you which answer (they are the same but in different forms) you want to use.]</em>
</span>
Hope I helped! Have a nice day! :)
8 0
3 years ago
What wrong with this 21.8x0.4=87.2
Brrunno [24]
I think the wrong is the answer , I hope that help , good luck
4 0
4 years ago
Read 2 more answers
When the sum of 1.9 and 2.2 is subtracted from the product of 1.9 and 2.2, what is the difference?
algol13
1.9+2.2= 4.1
1.9•2.2= 4.18
4.18-4.1= .08
6 0
3 years ago
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