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irinina [24]
2 years ago
12

I need help with this please​

Mathematics
1 answer:
finlep [7]2 years ago
5 0

like i said the ? would be a 5

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7y^2+15x-22. Y=4. ×=5
Nutka1998 [239]

let's plug the value of x and y as 5 and 4 respectively to find the value of given expression :

  • 7 {y}^{2}  + 15x - 22

  • 7(4) {}^{2}  + (15 \times 5) - 22

  • (7 \times 16) + 75 - 22

  • 112 + 53

  • 165
3 0
2 years ago
X
12345 [234]

Answer: 28.35\ minutes

Step-by-step explanation:

Let be "x" the time in minutes a 150-pound person must walk at  4 mph to use at least 190 calories.

 The amount of calories that a 150-pound person uses  in 1 minute when walking at a speed of 4 mph is:

Calories\ per\ minute=6.7

Therefore, knowing this, we can write the following proportion:

\frac{1}{6.7}=\frac{x}{190}

Finally, we must solve for "x" in order to find its value.

Multiplying both sides of the equation by 190, we get this result:

(190)(\frac{1}{6.7})=(\frac{x}{190})(190)\\\\x=28.35

3 0
3 years ago
A bottle of the medicine contains 0.5 kilograms of the medicine. One dose of the medicine is 20 grams for a child and 45 grams f
victus00 [196]
1.48 more grams of the medicine will be needed
5 0
3 years ago
Read 2 more answers
1. Solve the following system of equations, using matrix inversion method.
Jet001 [13]

Answer:

x = 142/83

y = 111/83

z = 452/83

8 0
2 years ago
Heidi has 6 pounds of tomatoes from her garden. She used 3/4 of all the tomatoes to make sauce and gave 2/3 of the rest of the t
iren2701 [21]

Answer:

She gives 16 ounces to her neighbor

Step-by-step explanation:

How much did you use to make sauce

6 * 3/4 = 18/4 =9/2 = 4.5  lbs

That leaves 6-4.5 = 1.5 lbs

She give 2/3 of this to her neighbor

1.5 * 2/3

Changing the decimal to a fraction

3/2 * 2/3 = 1

She gives 1  pound to her neighbor, but we want it in ounces

16 ounces equals 1 pound

She gives 16 ounces to her neighbor

6 0
3 years ago
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