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3 years ago

35% of 15 is what number

Mathematics

2 answers:

kiruha [24]3 years ago

5 0

Answer: 5.25

Step-by-step explanation: .35*15=5.25

kenny6666 [7]3 years ago

3 0

Answer:

5.25

Step-by-step explanation:

change the percent to a decimal by moving the dot to the left two places, then multiply it by the number

0.35*15=5.25

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What is 7/8 as a percent do not round?

bezimeni [28]

Answer:

87.5%

Step-by-step explanation:

1) divide 7 by 8 which gives you 0.875

2) move the decimal in 0.875 two spaces to the right which makes it as a percent of 87.5%

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4 years ago

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Please help me with this math problem

iren [92.7K]

Answer:

The third one

Step-by-step explanation:

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3 years ago

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Un automóvil corre a 120 kilómetros por hora y otro a 80 kilómUetros por hora; si deben recorrer 960 kilómetros, ¿con cuántas ho

Artist 52 [7]

Answer:

4 hours

Step-by-step explanation:

The speed of the first car is

$v_1 = 120 km/h$

While the speed of the second car is

$v_2=80 km/h$

The time it takes for each car to cover a distance d is

$t=\frac{d}{v}$

where

d = 960 km is the total distance covered

For car 1, the time taken is:

$t_1=\frac{960}{120}=8 h$

For car 2, the time taken is:

$t_2=\frac{960}{80}=12 h$

Therefore, the difference in time is:

$\Delta t =t_2-t_1 =12 -8 = 4 h$

8 0

3 years ago

Determine the projection of w onto u.

irina [24]

Answer:

A.6.2i-4.2 j

Step-by-step explanation:

We are given that

$u=9i-6j$

$v=-3i-2j$

$w=19i+15j$

We have to find the projection of w on to u.

The project of vector a on b

= $\frac{a\cdot b}{\mid b\mid^2}b$

$w.u=(19i+15j)\cdot (9i-6j)=171-90=81$

$\mid u\mid=\sqrt{x^2+y^2}=\sqrt{9^2+(-6)^2}=\sqrt{117}$

Using the formula

The projection of w on to u

$=\frac{u\cdot w}{\mid u\mid^2}(u)=\frac{81}{117}(9i-6j)$

The projection of w on to u=6.2i-4.2j

Hence, option A is true.

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3 years ago

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Which statements are true about a triangular pyramid? Check all that apply.

miss Akunina [59]

Answer:

It has exactly four faces that are triangles.

It has 4 vertices.

It has 6 edges.

Step-by-step explanation:

A triangular pyramid is also termed as a tetrahedron.

The properties of a triangular pyramid include:

four triangular faces,
six edges
four vertex corners.

Among the four faces, any one of them can be considered to be the base of the pyramid.

The faces are of equal shape and size.

The edges have the same length.

The triangles are equilateral.

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3 years ago

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