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Levart [38]
2 years ago
10

Use an informal argument to find the value of a PLEASE ANSWER FAST!!!

Mathematics
1 answer:
nata0808 [166]2 years ago
8 0
45 + a = 180 [ linear pair ]
a = 180 - 45
a = 135
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The point slope form of an equation of the line that passes through (-4, -3) and (12, 1) is y -1 =1/4(x-12). What is the standar
luda_lava [24]

The standard form: Ax + By = C.

We have:

y-1=\dfrac{1}{4}(x-12)\qquad|\text{multiply both sides by 4}\\\\4y-4=x-12\qquad|\text{add 12 to both sides}\\\\4y+8=x\qquad|\text{subtract 4y from both sides}\\\\8=x-4y

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3 years ago
1 3/8 x 5/8 please help me!​
natulia [17]

Answer:

55/64

Step-by-step explanation:

convert mixed number into improper fraction

11/8×5/8

multiply the fractions

11/8×5/8

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3 years ago
A tree 15 meters high casts a 21.4 meter shadow. Find the angle of elevation of the sun.
gogolik [260]

So we can set up a right triangle in this situation with one of the legs being 21.4m and the height being 15m. Then we can use trigonometric formulas to find the angle of elevation of the sun.

Since we have the dimensions for the opposite and the adjacent sides, we can use the trigonometric function tangent to find the angle:

tan(theta)=\frac{opposite}{adjacent}

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theta=tan^{-1}(\frac{15}{21.4})

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However this is in radians - to convert to degrees, we must use the formula:

Degrees=\frac{180}{\pi}  *radians

So then let's solve for degrees:

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7 0
3 years ago
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Dafna11 [192]

Answer:

millionths

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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zmey [24]

Answer:  (0.4247,0.7753)

Step-by-step explanation:

Given : Sample size : n=30

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The probability of people graduated from a registered welding course :p=\dfrac{18}{30}=0.6

Significance level : \alpha:1-0.95=0.05

Critical value : z_{\alpha/2}=1.96

A confidence interval for population proportion is given by :-

p \pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\=0.6\pm(1.96)\sqrt{\dfrac{0.6(1-0.6)}{30}}\\\\\approx0.6\pm0.1753\\\\=(0.4247,0.7753)

Hence,  the 95 percent confidence interval for the proportion of all welders who graduated from a registered welding course = (0.4247,0.7753)

5 0
3 years ago
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