3 years ago

Plz help me

Mathematics

2 answers:

Aleksandr [31]3 years ago

8 0

Decimal: 2.25
Fraction: 9/4

Snowcat [4.5K]3 years ago

6 0

Answer:

9/4 as a fraction or 2.25 as a decimal

Step-by-step explanation:

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Simplify the following. (a) 3(-3 + 5x) - 1 (4 - 4x) (b) 3 squareroot 64 x^15 y^3 -2(-15 e^5 t/30 e^-2 t^-3)^0

Kaylis [27]

Answer:

a. 19x-13 b. $2(32x^{15}y^{3}-1).$

Step-by-step explanation:

a. 3(-3+5x)-1(4-4x) = -9+15x-4+4x = 15x+4x-9-4 = 19x-13.

b. $64x^{15}y^{3}-2(-15e^{5}\frac{t}{30}e^{-2}t^{-3})^{0}$

= $64x^{15}y^{3}-2 = 2(32x^{15}y^{3}-1).$

6 0

3 years ago

Is it possible to obtain a negative value for the variance or the standard deviation?

Kaylis [27]

Standard deviation is the square root of the variance, which is the average squared deviation from the mean and as an average of some squared numbers it can't be negative<span>.

</span><span>The smallest value variance can reach is zero. This is when all the numbers in the data set are the same, therefore all the deviations from the mean are zero, all squared deviations are zero and their average is also zero.</span>

4 0

3 years ago

Which of the following choices is the y-intercept of the equation –3x – 2y = 10?

Mekhanik [1.2K]

-3x-2y=10
-2y=3x+10
y=-3/2x -5
If you put x as a value of 0 you will get that the y-intercept will end up being -5

8 0

2 years ago

Grade 10 math anyone?

Kisachek [45]

Answer:

6 years

Step-by-step explanation:

Here,

$I=60$

$P=200$

$R=0.05$

and we need to find $T$ .

So using the formula $I=PRT$ , we can find T by substituting the values

$60 = (200)(0.05)T$

$60=10T$

$T=\frac{60}{10} = 6$ years

8 0

2 years ago

Triangle OBC is a right triangle drawn on a coordinate plane. Side OC lies on the x-axis, the coordinates of point O are (0, 0),

Rudik [331]

Long leg = 8 → opposite
short leg = 6 → adjacent
hypotenuse = ?

8² + 6² = c²
64 + 36 = c²
100 = c²
√100 = √c²
10 = c

sin ∠BOC = opposite / hypotenuse
sin ∠BOC = 8 / 10
sin ∠BOC = 0.80

tan ∠BOC = opposite / adjacent
tan ∠BOC = 8 / 6
tan ∠BOC = 1.33

3 0

2 years ago