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kozerog [31]
2 years ago
12

Which expression is equivalent to 4 − (−7)? A 7 + 4 B 4 − 7 C −7 − 4 D −4 + 7

Mathematics
2 answers:
jeyben [28]2 years ago
6 0

Answer:

A.7+4

Step-by-step explanation:

4-(-7)

b/c negative times negative is postive

-(-)=+

-(+)= -

+(+)=+

hope it's helpful

THANK YOU.

ELEN [110]2 years ago
3 0

Answer:

7+4

Step-by-step explanation:

When you are subtracting a negative, you are really adding the number. For example, four minus negative seven is equal to four plus seven.  

4 - (-7) = 4+7

4+7 = 7+4 (By the commutive property of addition)

Let me know if this helps!

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Help me with geometry pleasee ( Radom answers will be reported )
IrinaVladis [17]
A. jgb=jb+Eh/2
35+45=80/2=40 JGB =40°
B. since it is a line HGJ =180-40
HGJ= 140°
C. tangents to circles have equal lengths if they intercept the way gd and gf do eachother
set the lengths equal to themselves
4x+5=6x-8
-4x both sides
5=2x-8
+8 both sides
13=2x
÷2 both sides
x=13/2 or 6.5
Plug in
4 (6.5)+5=
26+5=31ft
8 0
3 years ago
Express each ratio as a fraction in the simplest form.<br> 12 beetles out of 18 insects<br> .
slava [35]

Answer:

2/3

Step-by-step explanation:

12/6=2

18/6=3

so

the fraction is 2/3

i think this is what your teachers means, lmk if thats wrong

3 0
2 years ago
How can you determine the slope and the y- intercept of a line from a graph?
Molodets [167]
Slope: Take two points from the graph, and do y-y, over x-x.

for ex. (1,2) and (2,4) do 4-2 over 2-1. your slope is 2/1= 2


y-intercept: find the one point on the graph that is exactly on the y-axis.

for ex. (4,0)= your y-intercept is 4
6 0
3 years ago
What’s the domain and range of y=x^2+2
denpristay [2]

Answer:

domain: all real numbers

range: {y element R : y>=2}

Step-by-step explanation:

7 0
3 years ago
Please help with number 39
mr Goodwill [35]

You want to find values of v (number of visors sold) and c (number of caps sold) that satisfy the equation

... 3v + 7c = 4480

In intercept form, this equation is

... v/(1493 1/3) + c/640 = 1 . . . . . divide by 4480

Among other things, this tells us one solution is

... (v, c) = (0, 640)

The least common multiple of 3 and 7 is 21, so decreasing the number of caps sold by some multiple of 3 and increasing the number of visors sold by that same multiple of 7 will result in another possible solution.

The largest multiple of 21 that is less than 4480 is 213. Another possible solution is (0 +213·7, 640 -213·3) = (1491, 1)

We can also pick some number in between, say using 100 as the multiple

... (0 +100·7, 640 -100·3) = (700, 340)

In summary, your three solutions could be

... (visors, caps) = (0, 640), (700, 340), (1491, 1)

7 0
3 years ago
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