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Alika [10]
3 years ago
9

Evaluate each expression if x = −2, y = −3, and z = 5. 2x + 3y + z

Mathematics
1 answer:
zubka84 [21]3 years ago
6 0

Answer:

-8

Step-by-step explanation:

;

you put in 2*-2+3*-3+5 and the answer is-8

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I need help with both of these. I don’t understand
Makovka662 [10]

Answer:


Step-by-step explanation:

ok 1st figure out your slope and your y intercept.. -5 and +5 is your x so slope and your 0 and -5 is your y intercept. and graph that on your graph with your -4/3x and your +2. that should show you, your answer for number 12.

I sure do hope I am doing this correct and if this is wrong I am dearly sorry.


4 0
3 years ago
Angle x and y are complementary. Angle X is supplementary to a 128° angle. What are the measures of angle X and angle Y? Write a
FinnZ [79.3K]

Answer:

Solve for x:  x + 128 = 180, x = 52°

Solve for y: x + y = 90 or 52 + y = 90, y = 38°

Step-by-step explanation:

In order to solve for the measures of ∠x and ∠y, you first need to remember that angles that are complementary add up to 90° and angles that are supplementary add up to 180°.  So, in order to solve for 'x', which is supplementary to a 128° angle, we can set up an equation where the sum of ∠x and 128°  = 180°:  

x + 128 = 180, subtract 128 from both sides:  x + 128 - 128 = 180 - 128, x = 52°

Knowing that ∠x + ∠y = 90° and now that ∠x = 52°, we can set up the second equation:

52 + y = 90, subtract 52 from both sides: 52 + y - 52 = 90 - 52 or y = 38°

8 0
4 years ago
Jose constructed Triangle DCE, where m∠D = 103° and m∠C = 22°. Remy constructed triangle PQT, where m∠Q = 22°, and m∠T = 55°. Ar
prisoha [69]

Answer:

The missing angle in Jose's triangle is 180 - 103 - 22 = 55° and since both triangles have two congruent pairs of corresponding angles the answer is yes.

6 0
3 years ago
Read 2 more answers
Combine like terms to create an equivalent expression. 7.4z−5(−1.6z+2.4)
ryzh [129]

Answer:   15.4z-12

Step-by-step explanation:

For this exercise it is important to remember:

  • The Distributive property:

       a(b\±c)=ab\±ac

  • The multiplication of signs:

        (+)(+)=+\\\\(-)(-)=+\\\\(-)(+)=-

Then, given the following expression:

7.4z−5(-1.6z+2.4)

You need to  apply the Distributive property. Then:

=7.4z+8z-12

Now you can combine like terms (or add the like terms). Then you get:

=15.4z-12

Therefore, the equivalent expression created by combining like terms, is:

 15.4z-12

6 0
3 years ago
Oleg, Sasha, and Dima shared 600 toys. Sasha had twice as many toys as Oleg. Dima had 40 more toys than Oleg. How many toys did
Vilka [71]

Oleg, Sasha, and Dima shared 600 toys. Sasha had twice as many toys as Oleg. Dima had 40 more toys than Oleg.

Let the number of toys Oleg has = x

Let the number of toys Sasha has = y

Let the number of toys Dima has = z

Sasha had twice as many toys as Oleg

So y = 2*x= 2x

Dima had 40 more toys than Oleg.

z = x + 40

Oleg, Sasha, and Dima shared 600 toys

x + y + z= 600

We know y=2x and z=x+40

Replace it for y and z

x + y + z = 600

x + 2x + x + 40 = 600

4x + 40 = 600

Subtract 40 on both sides

4x =  600 - 40

Divide by 4 on both sides

x = \frac{560}{4} = 140

Oleg had 140 toys

4 0
4 years ago
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