3 years ago

I am doing test an am need help

Mathematics

1 answer:

enot [183]3 years ago

3 0

Answer:

its a

Step-by-step explanation:

< means less than and >means greather than

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uranmaximum [27]

The percentage of change is -37.5%

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3 years ago

Which option equals tan 40°? Select all that apply.

Sonbull [250]

Answers:
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(cos50)/(sin50)

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3 years ago

Find the length of CA to the nearest tenth of a foot

hoa [83]

Answer:

CA ≈ 3.1 ft

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan40° = $\frac{opposite}{adjacent}$ = $\frac{BC}{CA}$ = $\frac{2.6}{CA}$ ( multiply both sides by CA )

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CA = $\frac{2.6}{tan40}$ ≈ 3.1 ft ( to the nearest tenth )

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3 years ago

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Step-by-step explanation:

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3 years ago

Imagine a regression line that relates y = average systolic blood pressure to x = age. The average blood pressure for people 40

mart [117]

Answer:

2.0

Step-by-step explanation:

x = age

y = average systolic blood pressure

x₁ = 40 years old, y₁ = 110 systolic blood pressure

x₂ = 50 years old, y₂ = 130 systolic blood pressure

$\text{Slope of a line}=m=\frac{y_2-y_1}{x_2-x_1}\\\Rightarrow m= \frac{130-110}{50-40}\\\Rightarrow\frac{20}{10}\\\Rightarrow m= 2.0$

∴ Slope of the regression line is 2.0

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4 years ago