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3 years ago

HELP PLZ IM GIVING 25 BRAIN:EIST PLZZZ

Mathematics

2 answers:

Virty [35]3 years ago

8 0

Answer:

2km

Step-by-step explanation:

Distance = Speed ÷ Time

Distance = 3 ÷ 1.5 (as 1 hour and 30 minutes is an hour and a half)

Distance = 2km

son4ous [18]3 years ago

8 0

Answer:

4.5 km

Step-by-step explanation:

it takes an hour to walk 3. 1 hour is 60 minutes cut that in half to get 30, so you have to cut the 3 in half as well. which is 1.5. add 3 and 1.5 to get your answer 4.5

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Factor 16x^2 + 49. Check your work.

Shtirlitz [24]

Answer:

$16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

Step-by-step explanation:

Given : Expression $16x^2+49$

To find : Factor the expression ?

Solution :

The given expression is a quadratic function $y=ax^2+bx+c$ the solution is $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

On comparing with general form,

a=16, b=0, c=49

Substitute in the formula,

$x=\frac{-0\pm\sqrt{0^2-4(16)(49)}}{2(16)}$

$x=\frac{\pm\sqrt{-3136}}{32}$

$x=\frac{\pm56i}{32}$

$x=\frac{56i}{32},\frac{-56i}{32}$

$x=\frac{7i}{4},\frac{-7i}{4}$

Factors are $(x-\frac{7i}{4}),(x+\frac{7i}{4})$

Therefore, $16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

4 0

4 years ago

If you reflect ABCD across x-axis, what will be the coordinates of A’ and C’

disa [49]

Answer:

A (1, -5), B (2, -5)

8 0

3 years ago

Read 2 more answers

1. Margaret sold shoes for $200. Margaret increases

Alika [10]

Answer:

$400

Step-by-step explanation:

100% of 200 is 200 so combine them to get 400.

3 0

3 years ago

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A coffee table is on sale for 20% off the original price of $115. If there is 7.5% sales tax, what is the final price of the cof

alekssr [168]

Answer:

98.9

Step-by-step explanation:

115 - 20% = 92
92 + 7.5% = 98.9

7 0

3 years ago

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What is the equation of the line that passes through the point (–2,7) and has a slope of zero?

scZoUnD [109]

Answer:

y = 7

Step-by-step explanation:

Given:

x1 = -2

y1 = 7

slope (m) = 0

y - y1 = m ( x - x1 )

y - 7 = 0 ( x - (-2) )

y - 7 = 0 ( x + 2 )

y - 7 = 0

y = 7

4 0

2 years ago