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Ket [755]
3 years ago
7

If E[5X - 10) = 60, what is E[X]?

Mathematics
1 answer:
KiRa [710]3 years ago
8 0

Step-by-step explanation:

here,

1o

so X is equal to 10

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A car can travel 400 miles on a full tank of petrol. A more efficient car can travel 30% further. How many miles further can it
xxTIMURxx [149]

Answer:160 miles

Explanation:

You can work out this type of question by using the 'unitary' method, which means finding out how much for ONE.

If you set out the steps with short sentences it will be clearer.

On 15 gallons, a car can travel 400 miles÷15↓

On 1 gallon, a car can travel 400÷15=262

miles

Once you know the distance travelled on 1 gallon of fuel, you can work out the distance travelled for any number of gallons.

On 6 gallons the car can travel

6

×

26

2

3

miles.

(6 times further than on 1 gallon)

6

×

80

3

=

160

miles

4 0
3 years ago
The length of a rectangle is 11m more than twice the width, and the area of the rectangle is 63m^2 . find the dimensions of the
gulaghasi [49]
(7/2) m is the width and 18m is the length. This is because area is lxw.let w= width and length=11+2wMultiply together, get 2w^2+11w-63=0factor to get (2w-7)(w+9).Find w and get w=7/2 and w=-9Negative rejected because a measurement can't be negative. Finally substitute that into the length equation (11+2w) to get 18m and width is 7/2 m
4 0
3 years ago
How to know if two triangles are congruent. Currently learning SAS, SSS, ASA, and AAS.
krek1111 [17]

Answer:

Refer to the chart below for help:

SSS: When all three sides are equal to each other on both triangles, the triangle is congruent

AAS: If two angles and a non-included (you can think of it as outside) side of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent.

ASA: If two angles and the included side of one triangle are congruent to the corresponding parts of another triangle, then the triangles are congruent.

SAS: If any two angles and the included side are the same in both triangles, then the triangles are congruent.

3 0
3 years ago
Decide if each equation is true or false. Be prepared to explain your reasoning. A. 34.56000 = 34.56 B. 25 = 25.0 C. 2.405 = 2.4
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4 0
3 years ago
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A baker has 20 pounds of sugar. He uses 3/4 of the sugar to bake muffins. How much sugar does he have left?
arsen [322]

Hey there!

We can find the answer to this by finding how much is 3/4 of the sugar and subtracting that from the 20 pounds of sugar he started with.

3/4 in decimal form is 0.75, so we can multiply 20 by 0.75 to get 3/4 of 20.

0.75 x 20 = 15

This means 3/4 of the sugar is 15 pounds.

Now we can subtract that from the original 20 pounds he started with.

20 - 15 = 5

He has 5 pounds of sugar left.

Hope this helps!

3 0
3 years ago
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