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3 years ago

- 0.6(3x + 7) Simplify

Mathematics

1 answer:

andrey2020 [161]3 years ago

3 0

Answer:

Step-by-step explanation:

$-0.6(3x+7)\qquad\text{use the dystributive property}\ a(b+c)=ab+ac\\\\=(-0.6)(3x)+(-0.6)(7)\\\\=-1.8x-4.2$

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For me ots allmost 11 at night please help

slega [8]

Answer:

slope(m)= (9/4) and y intercept =5

Step-by-step explanation:

8 0

3 years ago

Determine the intercepts of the line. 4x-1=3y+5

guapka [62]

Calculate the intercepts bu replacing x or y with 0 and solving for the other.

4x - 1 = 3y + 5
If x = 0,
4(0) - 1 = 3y + 5
-1 = 3y + 5
-6 = 3y
y = -2

If y = 0
4x - 1 = 3(0) + 5
4x - 1 = 5
4x = 6
x = 6/4 or 3/2

x int: (3/2,0)
y int: (0,-2)

4 0

4 years ago

How do I solve this?

Minchanka [31]

The maximum happens at x = -b/2a

x = -48/2(-16) = 3/2

Now replace x in the equation and solve for y:

y = 48(3/2) - 16(3/2)^2

y = -72 - 36

y = 36

The maximum height is 36 feet.

4 0

4 years ago

What is 9/1 times 7/10

Grace [21]

To multiply two fractions:

-- Multiply their numerators; the product is the numerator of the new fraction.

9 x 7 = 63 ; the new fraction is (63) / (something)

-- Multiply their denominators; the product is the denominator of the new fraction.

1 x 10 = 10 ; the new fraction is <em>63/10</em> .

The product of the two original fractions is 63/10 , or <em>6.3</em> .

6 0

4 years ago

State your conclusion to the following hypothesis test.

Pepsi [2]

Answer:

Part A

a. There is not sufficient sample evidence to conclude that the full-time placement rate is now less than 87% because the p-value is greater than 0.05

Part B

$\hat Y$ = 17.9·(x) + 1.6

Part C

The teen pregnancy rate in Florida is 6.54

Step-by-step explanation:

The percentage of graduates that find full-time employment in their fields within the first year of graduation = 87%

The significant level of the hypothesis test = 5% = 0.05

The p-value = 0.07

Given that the testing conditions are met, we have;

The p-value is larger than the significant level of 0.05, therefore, it cannot be concluded that there is significant difference between the two rates

Therefore;

There is not enough statistical evidence available to come to a conclusion that the placement rate of full-time students has reduced below the given 87% because from the statistics, the p-value is larger than 0.05.

Part B

Number of Pages, x; 7, 12, 4, 14, 25, 30

Cost, y; 128, 213, 75, 250, 446, 540

The regression analysis formula is;

Y = a + b·X

We have;

$b = \dfrac{N\sum XY - \left (\sum X \right )\left (\sum Y \right )}{N\sum X^{2} - \left (\sum X \right )^{2}}$

∴ b = (6×34602-92×1652)/(6×1930 - 92²) ≈ 17.852

$a = \dfrac{\sum Y - b\sum X}{N}$

a = (1652 - 17.852 × 92)/6 ≈ 1.6

∴ Y ≈ 17.9·(x) + 1.6

Part C

The given regression model is y = 4.3 + 1.4(x)

Therefore, at x = 1.6, we get;

y = 4.3 + 1.4 × 1.6 = 6.54

The suggests that the teen pregnancy rate in Florida is 6.54.

8 0

3 years ago