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2 years ago

1. Solve the equation by finding square roots. 4a^2+16=0

Mathematics

1 answer:

Nonamiya [84]2 years ago

3 0

1. No solution

2. W= \sqrt{-7x-10}[/tex]

3. B= 0.5, -0.5

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Factorise 18x-6 will give brainly to whoever answers first

Sladkaya [172]

Answer:

6(3x-1)

Step-by-step explanation:

They both have a common factor of 6

So divide 6 and take it out to give:

6(3x-1)

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2 years ago

An airplane flies at a constant speed. It can travel a distance (d) of 1,800 kilometers in 2 hours (t).

ss7ja [257]

D = 900t

because if you want to simplify t (2 hours) into one then you divide 1800 by 2 and that gives you the constant of proportionality (slope) of 900. Using this information you can write the expression d = 900t.

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3 years ago

Find the area of the parallelogram. sq cm

Jlenok [28]

Answer:

I think the answer is 10 sq cm

Step-by-step explanation:

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2 years ago

Read 2 more answers

Please answer if so thank you and explain

anyanavicka [17]

Y=12+2x
y represents the number of pieces she now knows, x represents the number of weeks she has taken lessons, 2 is the slope (the number of pieces she'll learn each week), and 12 is the y intercept (the number of pieces she knew before taking lessons).

To solve the equation for 11 weeks, we replace x with 11.

2×11+12= 24
y=24

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2 years ago

A researcher wants to study the average miles run per day for marathon runners. In testing the hypotheses: H0: μ = 25 miles vs.

masya89 [10]

Answer:

The calculated value |Z| = 1.325 < 1.881 at 0.03 level of significance

Null hypothesis is accepted

Alternative hypothesis is rejected

A researcher wants to study the average miles run per day for marathon runners is 25

Step-by-step explanation:

Step(i):-

Given sample size 'n' = 36

Given mean of the sample x⁻ = 22.8 miles

Given mean of the Population 'μ' = 25

Given standard deviation of the Population 'σ' = 10

Null hypothesis:-H₀: μ = 25

Alternative Hypothesis:H₁:μ ≠ 25

Level of significance = 3 % or 97%

The critical value Z₀.₉₇ = 1.881

Step(ii):-

Test statistic

$Z = \frac{x^{-} - mean}{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{22.8 - 25}{\frac{10}{\sqrt{36} } }$

Z = -1.325

|Z| = |-1.325| = 1.325

The calculated value |Z| = 1.325 < 1.881 at 0.03 level of significance

Null hypothesis is accepted

Alternative hypothesis is rejected

conclusion:-

A researcher wants to study the average miles run per day for marathon runners is 25

6 0

2 years ago