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BabaBlast [244]
3 years ago
7

What is the value of z in the equation 4×2-z=7?

Mathematics
1 answer:
sladkih [1.3K]3 years ago
3 0
<span>4×2-z=7
⇒ 8 - z = 7
⇒ 8 - 7 = z
⇒ 1 = z
</span>
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Could use some help pls.
Murrr4er [49]

Answer:

9 cans of soup and the 4 frozen dinners were purchased

Step-by-step explanation:

Let x represent the number of cans of soup purchased.

Let y represent the number of frozen dinners purchased.

Lincoln purchased a total of 13 cans of soup and frozen dinners. This means that

x + y = 13

Each can of soup has 250 mg of sodium and each frozen dinner has 550 mg of sodium. The 13 cans of soup and frozen dinners which he purchased collectively contain 4450 mg of sodium. This means that

250x + 550y = 4450 - - - - - - - - -1

Substituting x = 13 - y into equation 1, it becomes

250(13 - y) + 550y = 4450

3250 - 250y + 550y = 4450

- 250y + 550y = 4450 - 3250

300y = 1200

y = 1200/300

y = 4

Substituting y = 4 into x = 13 - y, it becomes

x = 13 - 4 = 9

7 0
3 years ago
How many triangles can be made from the following three lengths: 3.1 centimeters, 9.8 centimeters, and 5.2 centimeters?
GenaCL600 [577]

Answer:

none

Step-by-step explanation:

We have three sides

Adding the two smallest sides together must be bigger than the third side

3.1+5.2 > 9.8

8.3> 9.8

This is false, so we cannot make a triangle

6 0
3 years ago
Use vertical calculation to find each product:<br> (5.4) x (2.4) =<br> (1.67) x (3.5) =
Bad White [126]

Answer: your answer for the equation: ((5.4) x (2.4) = 12.96

for the second one it would be ((1.67) x (3.5) = 5.845

~I hope this is correct and has helped you, have a great day/night~

Step-by-step explanation:

6 0
3 years ago
How do you solve the right triangle
yaroslaw [1]
Area:
A = base times height/2

Perimeter:
base time length times width 
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3 years ago
When x equals 12 , x+3y=21 need help
crimeas [40]

Answer:

y=3

Step-by-step explanation:

6 0
2 years ago
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