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4 years ago

Divide 21a3 − 14a by -7.

Mathematics

1 answer:

Elanso [62]4 years ago

7 0

Answer:

65a

Step-by-step explanation:

21a*3-14a/(-7)=

63a-(14*a over negative seven)=

65a

hope this helps! i cant write fractions, so i wrote it in words fyi

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The net of an isosceles triangular prism is shown here. What is the surface area, in square units, of the triangular prism?

Hitman42 [59]

To do this, find the surface area of each two-dimensional shape.

The two triangles have a combined area of 24.

The two rectangles have a combined area of 70.

The center rectangle has an area of 42.

Add them together to get 136 as your surface area.

6 0

3 years ago

Read 2 more answers

For questions 1-4 Find the missing triangle

Semenov [28]

Answer:

1. 51°

2. 40°

3. 65°

4. 60°

Step-by-step explanation:

The sum of the angles in a triangle is 180°. We can use the angles given to find the missing angle.

1. 51°

42+87+x=180

129+x=180

x=51

-------------------------------------------------------------------------------

2. 40°

110+30+x=180

140+x=180

x=40

-------------------------------------------------------------------------------

3. 65°

20+95+x=180

115+x=180

x=65

-------------------------------------------------------------------------------

4. 60°

60+60+x=180

120+x=180

x=60

8 0

3 years ago

halfway through the fourth year , harrys collection contains 400 pennies. study the graph provided at the beginning of this acti

elixir [45]

Answer:

The coordinates of the point is (3,5 , 400)

Step-by-step explanation:

The question is incomplete as the graph is not given in the question. Lets complete the question first. I have attached the graph related to this question below.

We can see in the graph that x-axis represents the years while the y-axis represents the pennies collected by Harry.

We have to find the coordinates of the point where he is able to collect 400 pennies.

As y-axis represents pennies, and the point to be found is at 400 pennies, so the y-coordinates of the point is 400.

Harry collects 400 pennies when he is halfway through 4rth year, which means that he has been collecting for:

3 years + Half of 4rth year = 3.5 years.

As x-axis represents the year and the point to be found is at 3.5 years, so the x-coordinate of the point is 3.5.

So, the coordinates of the point is (3,5 , 400)

This point can be seen in the second graph

8 0

3 years ago

Sue wants to plan a meal with 71 grams of fat and 1755 calories. If hot dogs have 13 grams of fat and 145 calories each and if b

Lena [83]

Answer:

Sue must use 3 hotdogs and 4 half-cup serving of baked beans.

Step-by-step explanation:

Let the number of hot dogs be represented by h

Let the number of baked beans be represented by b

Hot dogs have 13 grams of fat and 145 calories each

Baked beans have 8 grams of fat and 330 calories per half cup serving

Sue wants to plan a meal with 71 grams of fat and 1755 calories.

Grams of Fat from Hotdog + grams of fat from baked beans=71

13h+8b=71....(I)

Similarly,

Calories from hot dog + Calories from baked beans=1755

145h+330b=1755....(II)

We then solve Equations (I) and (II) simultaneously.

13h+8b=71....(I)

145h+330b=1755....(II)

Multiply equation 1 by 145 and equation 2 by 13

1885h+1160b=10295

1885h+4290b=22815

Subtracting

-3130b=-12520

b=4

Substitute b=4 into (I)

13h+(8X4)=71

13h=71-32

13h=39

h=3

Sue must use 3 hotdogs and 4 half-cup serving of baked beans.

4 0

4 years ago

8x + 3x in a expression

Serggg [28]

Answer:

11x

Step-by-step explanation:

Add 8+3 and keep the x which gives you 11x.

3 0

3 years ago