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Liono4ka [1.6K]
3 years ago
8

I need help with numbers 7-9 please

Mathematics
1 answer:
jolli1 [7]3 years ago
7 0

Answer:

C

5(10)+10=60

-2(-5)+7=17

Step-by-step explanation:


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Anybody know the answer?
Gwar [14]

( A u B) would be the combination of both sets.

Since both sets have all distinct numbers, just add the 2 sets together.

4 + 7 = 11

There are 11 elements.

6 0
3 years ago
Help me with these please!!
Arisa [49]
Five out of 35 (27+5) students wear a fun Pi-Shirt. 

Construct a ratio:

5 (people with a fun t-shirt on)                  59 (people with a fun t-shirt on)
________________________          = 
32 (number of people in one class)          x (number of students in the school)


The correct answer is D.


7 0
3 years ago
Find the length of the diagonal AD in the pentagon ABCDE shown in the coordinate plane.
Xelga [282]

Answer:

\sqrt{73} units.

Therefore, Option C is correct.

Step-by-step explanation:

We have given a pentagon ABCDE

We need to calculate its length

That means we have to find the distance of AD

So, coordinates of A(1,6) and D(4,-2)

Using distance formula:

\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}

Here,x_1=1,y_1=6,x_2=4,y_2=-2

On substituting the values we will get:

\sqrt{(4-1)^2+(-2-6)^2}

On simplification:

\sqrt{3^2+(-8)^2}

\sqrt{9+64}

\sqrt{73}.

Hence, the length of AD is  \sqrt{73} units.

Therefore, Option C is correct.

6 0
3 years ago
39-(-46)+29= show steps
Leno4ka [110]
Basically your negatives beside each other turn into a positive because two negatives equals a positive

8 0
3 years ago
Find g(a-2)+3g(2a) if g(x)=x²-5x+8
sertanlavr [38]

Answer:

13a² - 39a + 46

Step-by-step explanation:

To find g(a-2)+3g(2a), find each part using the function g(x)=x²-5x+8.

g(a-2) = (a-2)²-5(a-2)+8 = a² - 4a + 4-5a + 10+8 = a² - 9a + 22

3g(2a) = 3{(2a)²-5(2a)+8} = 3{ 4a² - 10a + 8} = 12a² - 30a + 24

Combine the values to find g(a-2)+3g(2a).

g(a-2)+3g(2a) = (a² - 9a + 22) + (12a² - 30a + 24) = 13a² - 39a + 46

4 0
3 years ago
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