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Kazeer [188]
3 years ago
8

I need help is -7+9 = -9+7 true false or open

Mathematics
1 answer:
victus00 [196]3 years ago
3 0

Answer:

false

Step-by-step explanation:

-7+9 = 2

-9+7 = -2

2 does not equal -2

False

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Haha please help i don't know what I'm doing
tresset_1 [31]

Answer:

(5x+1)(x+7)

Step-by-step explanation:

4x^2+26x+6+x^2+10x

5x^2+36x+7

(5x+1)(x+7)

Prove

5x*x + 5x*7 + 1*x + 1*7

= 5x^2 + 35x + x + 7

= 5x^2 + 36x + 7

4 0
2 years ago
3
Pavel [41]

Answer: three dimensional figure and plane.

Step-by-step explanation:

A cross section is the intersection between a (three dimensional figure) and also a (plane).

When an object is being cut straight, the shape that we get is referred to as the cross section. We should note that several parallel cross sections will be firmed when we cut a particular object into slices.

4 0
3 years ago
Solve the system of linear equations by substitution.<br><br> 5x+2y=9<br><br> x+y=-3
Hatshy [7]
Step 1: subtract x from -3. New equation should be y=-3-x.
Step 2: plug that equation into top equation. Should be 5x + 2(-3-x) = 9.
Step 3: use distribitive properties on 2(-3-x). New equation is 5x - 6 - 2x = 9.
Step 4: combine like terms. New equation 3x - 6 = 9.
Step 5: work it out. Divide 3x and 9 by 3. New equation is x - 6 = 3. Add 6 to -6 and 9. Final eqaution is x = 9.
Step 6: swap 9 for x in second equation. New equation is 9 + y = -3
Step 7: subtract 9 from 9 and -3. New equation is y = -12
: = = -
8 0
3 years ago
what is the mean absolute deviation of the following numbers 18,28,24,25,15. ​
horsena [70]

Answer:

4.4

Step-by-step explanation:

3 0
3 years ago
In your own words, what is the difference between an equation and an expression?
otez555 [7]

Answer:

An expression doesn't have an defiant answer. While an equation does.

Yes, you can copy and paste saying its your own words.

Hope this helps! <3

6 0
3 years ago
Read 2 more answers
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